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881 relations: Aaron Louis Treadwell, Abarenicola pacifica, Aboleth, Acanthobdella peledina, Acanthodrilidae, Acanthopagrus butcheri, Acetabulum (morphology), Acipenser oxyrinchus, Acoetidae, Acrocirridae, Addison Emery Verrill, Adyte assimilis, Aeolosoma, Aeolosomatidae, Agamococcidiorida, Agmata, Agricultural soil science, Ainudrilus geminus, Alitta, Alitta succinea, Alitta virens, Aliwal Shoal, Allolobophora chlorotica, Allorecognition, Almidae, Alphonse Malaquin, Alvinella pompejana, Alvinellidae, American butterfish, Americobdella, Ampharetidae, Amphibian, Amphitrite ornata, Amphiuma, Amphiuma pholeter, Anatomy, Andiorrhinus kuru, Androdioecy, Angling in Yellowstone National Park, Animal, Animal Coloration (book), Animal communication, Annelid, Annona Chalk, Annulus (zoology), Antipodes snipe, Aphelochaeta antelonga, Aphelochaeta guimondi, Aphelochaeta praeacuta, Aphelochaeta striata, ..., Aphelochaeta zebra, Aphrodita, Aphrodita aculeata, Apicomplexa, Aplacophora, Aporrectodea, Aporrectodea caliginosa, Aporrectodea rosea, Appendiculata, Archigregarinorida, Arctonoe, Arctonoe vittata, Arenicolidae, Argilophilus, Arhynchobdellida, Arripis, Arthropod, Arthropod head problem, Articulata hypothesis, Ascetosporea, Asexual reproduction, Astome, Astroblepus, Asymmetric cell division, Atlantic herring, Atlantic horseshoe crab, Atlantic silverside, Atlantic stargazer, Atlases of the flora and fauna of Britain and Ireland, Australonuphis, Baffin Bay (Texas), Baltic amber, Banded dragonet, Banffia, Barker Inlet-St Kilda Aquatic Reserve, Barred danio, Bathydrilus egenus, Bathydrilus vetustus, Bearded fireworm, Bengal danio, Benthic boundary layer, Benthoscolex, Bhawania, Bhawania goodei, Bilateria, Biodiversity of New Caledonia, Bioluminescence, Biomineralising polychaete, Biremis blandi, Bisphenol A, Bispira, Bispira brunnea, Bispira volutacornis, Black-tailed godwit, Blackeye goby, Blood, Blue striped grunt, Bluntnose stingray, Body plan, Bonellia viridis, BPA controversy, Brachiopod, Brallier Formation, Branchiobdellida, Brifacia aragonensis, Bryozoa, Burgessochaeta, Bylgides groenlandicus, C9orf135, Callinectes sapidus, Cambrian explosion, Canadia (annelid), Canalipalpata, Cannibalism, Capitella, Capitella capitata, Capitella teleta, Capitellidae, Carboniferous, Caryophyllidea, Cavalier-Smith's system of classification, Cestoda, Chaeta, Chaetocladus, Chaetogaster, Chaetopterus, Chaetopterus pugaporcinus, Chaetopterus variopedatus, Charles Joseph Gravier, Cheek pouch, Chitinozoan, Chloeia, Chloeia flava, Chloragogen cell, Chlorocruorin, Chrysopetalidae, Chrysopetalum, Chtonobdella limbata, Circulatory system, Cirratulidae, Cirratulus cirratus, Cirriformia, Cirriformia capensis, Cirriformia tentaculata, Clarence J. 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Expand index (831 more) »
Aaron Louis Treadwell
Aaron Louis Treadwell, Ph.D. (1866–1947) was a college professor of zoology at Vassar.
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Abarenicola pacifica
Abarenicola pacifica or the Pacific lugworm is a large species of polychaete worm found on the west coast of North America and also in Japan.
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Aboleth
In the Dungeons & Dragons fantasy role-playing game, aboleths are a fictitious race of malevolent, eel-like aberrations with potent psionic abilities.
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Acanthobdella peledina
Acanthobdella peledina is a species of leech in the infraclass Acanthobdellidea.
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Acanthodrilidae
The Acanthodrilidae are an ancient and widely distributed family of earthworms which has native representatives in Australia, New Zealand, South Africa, South America, and North America.
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Acanthopagrus butcheri
− Acanthopagrus butcheri, the black bream but also commonly known as the southern black bream, southern bream and blue-nosed bream, is a species of marine and freshwater fish of the porgy family, Sparidae.
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Acetabulum (morphology)
Acetabulum (plural acetabula) in invertebrate zoology is a saucer-shaped organ of attachment in some annelid worms (like leech) and flatworms.
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Acipenser oxyrinchus
Acipenser oxyrinchus is a species of sturgeon.
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Acoetidae
Acoetidae is a family of polychaete worms in the subclass Aciculata.
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Acrocirridae
Acrocirridae is a family of polychaete worms.
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Addison Emery Verrill
Addison Emery Verill (February 9, 1839, Greenwood, Maine – December 10, 1926, Santa Barbara, California) was an American zoologist.
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Adyte assimilis
Adyte assimilis is a marine polychaete scale worm in the family Polynoidae.
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Aeolosoma
Aeolosoma is a genus of minute annelid worms, variously attributed either to oligochaetes or polychaetes.
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Aeolosomatidae
The Aeolosomatidae is a family of very small, acquatic annelid worms, the affinities of which are uncertain.
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Agamococcidiorida
Agamococcidiorida is an order within the subclass Coccidia of the phylum Apicomplexia.
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Agmata
Agmata is a proposed extinct phylum of animals with a calcareous conical shell, previously thought to be cephalopods or annelid worms.
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Agricultural soil science
Agricultural soil science is a branch of soil science that deals with the study of edaphic conditions as they relate to the production of food and fiber.
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Ainudrilus geminus
Ainudrilus geminus is a species of clitellate oligochaete worm, first found in Belize, on the Caribbean side of Central America.
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Alitta
Alitta is a genus of marine annelids in Nereididae family (commonly known as sandworms or ragworms).
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Alitta succinea
Alitta succinea (known as the pile worm or clam worm) is a species of marine annelid in the family Nereididae (commonly known as ragworms or sandworms).
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Alitta virens
Alitta virens (common names include sandworm and king ragworm; older scientific names including Nereis virens are still frequently used) is an annelid worm that burrows in wet sand and mud.
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Aliwal Shoal
The Aliwal Shoal is a rocky reef which is the remains of an ancient sand dune approximately off the coast of KwaZulu-Natal, South Africa.
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Allolobophora chlorotica
Allolobophora chlorotica, or green worm, is a species of earthworm that feeds and lives in soil.
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Allorecognition
Allorecognition is the ability of an individual organism to distinguish its own tissues from those of another.
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Almidae
The animal family Almidae includes about six genera of segmented worms.
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Alphonse Malaquin
Alphonse Malaquin (24 October 1868 – 22 April 1949) was a French zoologist born in the village of Cambrésis.
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Alvinella pompejana
Alvinella pompejana, the Pompeii worm, is a species of deep-sea polychaete worm (commonly referred to as "bristle worms").
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Alvinellidae
The Alvinellidae are a family of small, deep-sea polychaete worms endemic to hydrothermal vents in the Pacific Ocean.
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American butterfish
The American butterfish (Peprilus triacanthus), also known as the Atlantic butterfish, is a butterfish of the family Stromateidae.
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Americobdella
Americobdella is a genus of carnivorous leeches from southern Chile, comprising only the species Americobdella valdiviana.
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Ampharetidae
Ampharetidae are a family of terebellid "bristle worm" (class Polychaeta).
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Amphibian
Amphibians are ectothermic, tetrapod vertebrates of the class Amphibia.
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Amphitrite ornata
Amphitrite ornata or ornate worm, is a species of marine polychaete worm in the family Terebellidae.
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Amphiuma
Amphiuma is a genus of aquatic salamanders from the United States, the only extant genus within the family Amphiumidae.
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Amphiuma pholeter
The one-toed amphiuma (Amphiuma pholeter) is an aquatic, eel-like salamander native to the southeastern United States.
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Anatomy
Anatomy (Greek anatomē, “dissection”) is the branch of biology concerned with the study of the structure of organisms and their parts.
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Andiorrhinus kuru
Andiorrhinus kuru of the family Glossoscolecidae in the class Oligochaeta is a species of earthworm found in the Alto Orinoco of Amazonas state in Venezuela.
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Androdioecy
Androdioecy is a reproductive system characterized by the coexistence of males and hermaphrodites.
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Angling in Yellowstone National Park
Angling in Yellowstone National Park is a major reason many visitors come to the park each year and since it was created in 1872, the park has drawn anglers from around the world to fish its waters.
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Animal
Animals are multicellular eukaryotic organisms that form the biological kingdom Animalia.
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Animal Coloration (book)
Animal Coloration, or in full Animal Coloration.
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Animal communication
Animal communication is the transfer of information from one or a group of animals (sender or senders) to one or more other animals (receiver or receivers) that affects the current or future behavior of the receivers.
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Annelid
The annelids (Annelida, from Latin anellus, "little ring"), also known as the ringed worms or segmented worms, are a large phylum, with over 22,000 extant species including ragworms, earthworms, and leeches.
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Annona Chalk
The Annona Chalk is a geologic formation in Arkansas, Texas, Louisiana, and Oklahoma.
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Annulus (zoology)
In zoology, an annulus is an external circular ring.
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Antipodes snipe
The Antipodes Island snipe (Coenocorypha aucklandica meinertzhagenae), also known as the Antipodes snipe, is an isolated subspecies of the Subantarctic snipe that is endemic to the Antipodes Islands, a subantarctic island group south of New Zealand in the Southern Ocean.
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Aphelochaeta antelonga
Aphelochaeta antelonga is a species of bitentaculate cirratulidan first found in the Pacific coast of Costa Rica, at a shallow subtidal depth of about in the Gulf of Nicoya.
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Aphelochaeta guimondi
Aphelochaeta guimondi is a species of bitentaculate cirratulidan first found in the Pacific coast of Costa Rica, at a shallow subtidal depth of about in the Gulf of Nicoya.
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Aphelochaeta praeacuta
Aphelochaeta praeacuta is a species of bitentaculate cirratulidan first found in the Pacific coast of Costa Rica, at a shallow subtidal depth of about in Bahia Culebra.
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Aphelochaeta striata
Aphelochaeta striata is a species of bitentaculate cirratulidan first found in the Pacific coast of Costa Rica, at a shallow subtidal depth of about in the Gulf of Nicoya.
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Aphelochaeta zebra
Aphelochaeta zebra is a species of bitentaculate cirratulidan first found in the Pacific coast of Costa Rica, at a coral reef in Golfo Dulce.
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Aphrodita
Aphrodita, or sea mouse, is a genus of marine polychaete worms found in the Mediterranea sea and the eastern and western Atlantic Ocean.
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Aphrodita aculeata
Aphrodita aculeata, the sea mouse, is a marine polychaete worm found in the North Atlantic, the North Sea, the Baltic Sea and the Mediterranean.
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Apicomplexa
The Apicomplexa (also called Apicomplexia) are a large phylum of parasitic alveolates.
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Aplacophora
Aplacophora is a monophyletic group of small, deep-water, exclusively benthic, marine molluscs found in all oceans of the world.
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Aporrectodea
Aporrectodea is a genus of earthworms in the family Lumbricidae.
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Aporrectodea caliginosa
Aporrectodea calignosa (also known as Allolobophora similis or the grey worm) is an earthworm commonly found in Great Britain.
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Aporrectodea rosea
Aporrectodea rosea, the rosy-tipped worm, is a species of earthworm commonly found in Europe especially in Ukraine.
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Appendiculata
Appendiculata is a zoological name introduced by E. Ray Lankester (preface to the English edition of C. Gegenbaur's Comparative Anatomy), and employed by the same writer in the 9th edition of Encyclopædia Britannica (article "Zoology") to denote the eighth phylum, or major division, of coelomate animals.
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Archigregarinorida
The Archigregarinorida are an order of parasitic alveolates in the phylum Apicomplexa.
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Arctonoe
Arctonoe is a genus of scaled polychaete worms commonly known as the "scale worms".
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Arctonoe vittata
Arctonoe vittata is a species of scaled polychaete worms commonly known as a "scale worm".
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Arenicolidae
Arenicolidae is a family of marine polychaete worms.
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Argilophilus
Argilophilus is a genus of western North American earthworms of the family Megascolecidae that are characteristically found under native vegetation.
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Arhynchobdellida
The proboscisless leeches, Arhynchobdellida, are classified as an order of the Hirudinea.
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Arripis
Arripis is a genus of marine fishes from Australia and New Zealand, known as Australian salmon, kahawai and Australian herring.
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Arthropod
An arthropod (from Greek ἄρθρον arthron, "joint" and πούς pous, "foot") is an invertebrate animal having an exoskeleton (external skeleton), a segmented body, and paired jointed appendages.
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Arthropod head problem
The arthropod head problem is a long-standing zoological dispute concerning the segmental composition of the heads of the various arthropod groups, and how they are evolutionarily related to each other.
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Articulata hypothesis
The Articulata hypothesis is the grouping in a higher taxon of animals with segmented bodies, consisting of Annelida and Panarthropoda.
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Ascetosporea
The Ascetosporea are a group of eukaryotes that are parasites of animals, especially marine invertebrates.
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Asexual reproduction
Asexual reproduction is a type of reproduction by which offspring arise from a single organism, and inherit the genes of that parent only; it does not involve the fusion of gametes, and almost never changes the number of chromosomes.
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Astome
Astomes (order Astomatida) are a group of ciliate eukaryotes commonly found in the guts of annelid worms, especially oligochaetes, and other invertebrates.
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Astroblepus
Astroblepus is a genus of fish in the family Astroblepidae found in South America and Panama.
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Asymmetric cell division
An asymmetric cell division produces two daughter cells with different cellular fates.
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Atlantic herring
Atlantic herring (Clupea harengus) is a herring in the family Clupeidae.
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Atlantic horseshoe crab
The Atlantic horseshoe crab (Limulus polyphemus), also known as the American horseshoe crab, is a species of marine and brackish chelicerate arthropod.
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Atlantic silverside
The Atlantic silverside (Menidia menidia) also known as spearing in the north east of the United States, is a small species of fish from the West Atlantic, ranging from the Gulf of St. Lawrence in Canada to northeastern Florida in USA.
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Atlantic stargazer
Atlantic stargazer (Uranoscopus scaber) is a marine, subtropical fish of family Uranoscopidae.
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Atlases of the flora and fauna of Britain and Ireland
The biodiversity of Great Britain and Ireland is one of the most well-studied geographical areas of its size in the world.
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Australonuphis
Australonuphis, commonly called Australian beach worms, are a genus of annelid commonly used as bait by anglers.
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Baffin Bay (Texas)
Baffin Bay is a bay in South Texas, an inlet of the larger Laguna Madre.
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Baltic amber
The Baltic region is home to the largest known deposit of amber, called Baltic amber or succinite.
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Banded dragonet
Callionymus fasciatus, the banded dragonet, is a species of dragonet native to the Mediterranean Sea from the Gulf of Genoa to the western Aegean Sea.
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Banffia
Banffia is a genus of animals described from Middle Cambrian fossils.
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Barker Inlet-St Kilda Aquatic Reserve
Barker Inlet-St Kilda Aquatic Reserve is a marine protected area in the Australian state of South Australia located in waters adjoining the east coast of Gulf St Vincent in Barker Inlet about north of the state capital of Adelaide.
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Barred danio
The barred danio (Devario pathirana) is a fish belonging to the minnow family (Cyprinidae).
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Bathydrilus egenus
Bathydrilus egenus is a species of clitellate oligochaete worm, first found in Belize, on the Caribbean side of Central America.
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Bathydrilus vetustus
Bathydrilus vetustus is a species of clitellate oligochaete worm, first found in Belize, on the Caribbean side of Central America.
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Bearded fireworm
The bearded fireworm (Hermodice carunculata) is a type of marine bristleworm belonging to the Amphinomidae family, native to the tropical Atlantic Ocean and the Mediterranean Sea.
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Bengal danio
The Bengal danio or Sind danio (Devario devario) is a subtropical fish belonging to the minnow family (Cyprinidae).
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Benthic boundary layer
The benthic boundary layer (BBL) is the layer of water directly above the sediment at the bottom of a river, lake or sea.
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Benthoscolex
Benthoscolex, is a genus of fireworms belonging to the family Amphinomidae.
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Bhawania
Bhawania is a genus of polychaete worms in the family Chrysopetalidae.
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Bhawania goodei
Bhawania goodei is a species of polychaete worms in the family Chrysopetalidae.
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Bilateria
The Bilateria or bilaterians, or triploblasts, are animals with bilateral symmetry, i.e., they have a head (anterior) and a tail (posterior) as well as a back (dorsal) and a belly (ventral); therefore they also have a left side and a right side.
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Biodiversity of New Caledonia
The biodiversity of New Caledonia is of exceptional biological and paleoecological interest.
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Bioluminescence
Bioluminescence is the production and emission of light by a living organism.
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Biomineralising polychaete
Biomineralising polychaetes are polychaetes that biomineralize.
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Biremis blandi
Biremis blandi is a species of marine polychaete worm and the only species in the genus Biremis.
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Bisphenol A
Bisphenol A (BPA) is an organic synthetic compound with the chemical formula (CH3)2C(C6H4OH)2 belonging to the group of diphenylmethane derivatives and bisphenols, with two hydroxyphenyl groups.
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Bispira
Bispira is a genus of marine bristleworm in the family Sabellidae.
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Bispira brunnea
Bispira brunnea, the social feather duster or cluster duster, is a species of marine bristleworm.
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Bispira volutacornis
Bispira volutacornis, sometimes known by the common names twin fan worm or spiral fan worm, is a type of tube worm.
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Black-tailed godwit
The black-tailed godwit (Limosa limosa) is a large, long-legged, long-billed shorebird first described by Carl Linnaeus in 1758.
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Blackeye goby
The blackeye goby (Rhinogobiops nicholsii) is a species of true goby in the family Gobiidae.
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Blood
Blood is a body fluid in humans and other animals that delivers necessary substances such as nutrients and oxygen to the cells and transports metabolic waste products away from those same cells.
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Blue striped grunt
The blue striped grunt (Haemulon sciurus) or bluestriped grunt, is a subtropical species of grunt native to the western Atlantic Ocean.
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Bluntnose stingray
The bluntnose stingray or Say's stingray (Dasyatis say, often misspelled sayi) is a species of stingray in the family Dasyatidae, native to the coastal waters of the western Atlantic Ocean from the U.S. state of Massachusetts to Venezuela.
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Body plan
A body plan, Bauplan (German plural Baupläne), or ground plan is a set of morphological features common to many members of a phylum of animals.
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Bonellia viridis
Bonellia viridis, the green spoonworm, is a marine worm (Class Echiura, phylum Annelida) noted for displaying exceptional sexual dimorphism and for the biocidal properties of a pigment in its skin.
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BPA controversy
Bisphenol A controversy centers on concerns and debates about the biomedical significance of bisphenol A (BPA), which is a precursor to polymers that are used in some consumer products, including some food containers.
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Brachiopod
Brachiopods, phylum Brachiopoda, are a group of lophotrochozoan animals that have hard "valves" (shells) on the upper and lower surfaces, unlike the left and right arrangement in bivalve molluscs.
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Brallier Formation
The Devonian Brallier Formation is a mapped bedrock unit in Pennsylvania, Maryland, West Virginia, and Virginia.
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Branchiobdellida
Branchiobdellida are an order of leech-like clitellates that are mostly exoparasites of crayfish.
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Brifacia aragonensis
Brifacia aragonensis is a species of annelid worm in the class Polychaeta, which particularly lives in slightly acidified coastal systems in the Mediterranean Sea.
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Bryozoa
Bryozoa (also known as the Polyzoa, Ectoprocta or commonly as moss animals) are a phylum of aquatic invertebrate animals.
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Burgessochaeta
Burgessochaeta is an extinct genus of polychaete annelids from the Middle Cambrian.
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Bylgides groenlandicus
Bygides groenlandicus is a marine scale worm that lives in cold waters.
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C9orf135
C9orf135 is a gene that encodes a 229 amino acid protein.
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Callinectes sapidus
Callinectes sapidus (from the Greek calli-.
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Cambrian explosion
The Cambrian explosion or Cambrian radiation was an event approximately in the Cambrian period when most major animal phyla appeared in the fossil record.
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Canadia (annelid)
Canadia (meaning of Canada or after Canada) is a genus of extinct annelid worm present in Burgess Shale type Konservat-Lagerstätte.
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Canalipalpata
Canalipalpata, also known as bristle-footed annelids or fan-head worms, is an infraclass of polychaete worms, with 31 families in it including the Sabellida (tubeworms, fanworms, and feather duster worms) and the Alvinellidae, a family of deep-sea worms associated with hydrothermal vents.
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Cannibalism
Cannibalism is the act of one individual of a species consuming all or part of another individual of the same species as food.
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Capitella
Capitella is a polychaete worm genus in the family Capitellidae.
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Capitella capitata
Capitella capitata is a polychaete worm that grows up to 10 cm in length.
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Capitella teleta
Capitella teleta is a small, cosmopolitan, segmented annelid worm.
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Capitellidae
Capitellidae is a polychaete worm family in the subclass Scolecida.
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Carboniferous
The Carboniferous is a geologic period and system that spans 60 million years from the end of the Devonian Period million years ago (Mya), to the beginning of the Permian Period, Mya.
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Caryophyllidea
The Caryophyllideans are a group of tapeworms that infect fish and annelids (segmented worms) with a simple scolex or "head." Worms in this order only have one proglottid, which is believed to be the primitive condition for tapeworms.
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Cavalier-Smith's system of classification
The classification system of life introduced by British zoologist Thomas Cavalier-Smith involves systematic arrangements of all life forms on earth.
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Cestoda
Cestoda is a class of parasitic worms in the flatworm (Platyhelminthes) phylum, commonly known as tapeworms.
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Chaeta
A chaeta or cheta (see spelling differences) is a chitinous bristle or seta found on an insect, arthropod or annelid worms such as the earthworm, although the term is also frequently used to describe similar structures in other invertebrates.
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Chaetocladus
Chaetocladus is a non-calcifying genus of unicellular green algae known from the Upper Silurian.
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Chaetogaster
Chaetogaster is a genus belonging to the segmented worms (Annelida).
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Chaetopterus
Chaetopterus or the parchment worm or parchment tube worm is a genus of marine polychaete worm that lives in a tube it constructs in sediments or attaches to a rocky or coral reef substrate.
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Chaetopterus pugaporcinus
Chaetopterus pugaporcinus, commonly known as the pigbutt worm or flying buttocks, is a species of worm first described by scientists at the Monterey Bay Aquarium Research Institute in 2007.
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Chaetopterus variopedatus
Chaetopterus variopedatus is a species of parchment worm, a marine polychaete in the family Chaetopteridae.
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Charles Joseph Gravier
Charles Joseph Gravier (4 March 1865, in Orléans – 15 November 1937, in Paris) was a French zoologist.
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Cheek pouch
Cheek pouches are pockets on both sides of the head of some mammals between the jaw and the cheek.
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Chitinozoan
Chitinozoa (singular: chitinozoan, plural: chitinozoans) are a taxon of flask-shaped, organic walled marine microfossils produced by an as yet unknown animal.
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Chloeia
Chloeia is a genus of marine polychaete worms.
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Chloeia flava
Chloeia flava, also known as the golden fireworm, is a segmented bristleworm belonging to the family Amphinomidae.
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Chloragogen cell
Chloragogen cells, also called as y cells, are cells in annelids that function similarly to the liver in vertebrates.
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Chlorocruorin
Chlorocruorin is an oxygen-binding hemeprotein present in the blood plasma of many annelids, particularly certain marine polychaetes.
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Chrysopetalidae
Chrysopetalidae is a family of polychaete worms.The body is short or elongated, with few or numerous segments.All segments bear on their dorsal side a fan or a transverse row of paleae.
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Chrysopetalum
Chrysopetalum is a genus of polychaete worms.
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Chtonobdella limbata
Chtonobdella limbata is a species of blood sucking leech, found in New South Wales, Australia.
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Circulatory system
The circulatory system, also called the cardiovascular system or the vascular system, is an organ system that permits blood to circulate and transport nutrients (such as amino acids and electrolytes), oxygen, carbon dioxide, hormones, and blood cells to and from the cells in the body to provide nourishment and help in fighting diseases, stabilize temperature and pH, and maintain homeostasis.
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Cirratulidae
Cirratulidae is a family of marine polychaete worms.
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Cirratulus cirratus
Cirratulus cirratus is a species of marine polycheate worm in the family Cirratulidae.
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Cirriformia
Cirriformia is a genus of marine polychaete worms in the family Cirratulidae.
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Cirriformia capensis
Cirriformia capensis, commonly known as the orange thread-gilled worm, is a species of marine polychaete worm in the family Cirratulidae.
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Cirriformia tentaculata
Cirriformia tentaculata, is a species of marine polychaete worm in the family Cirratulidae.
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Clarence J. Goodnight
Clarence James Goodnight (May 30, 1914 – August 9, 1987) was an American zoologist who made contributions to the study of freshwater annelids and harvestmen (Opiliones).
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Cleavage (embryo)
In embryology, cleavage is the division of cells in the early embryo.
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Clitellata
The Clitellata are a class of annelid worms, characterized by having a clitellum - the 'collar' that forms a reproductive cocoon during part of their life cycles.
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Clitellum
The clitellum is a thickened glandular and non-segmented section of the body wall near the head in earthworms and leeches, that secretes a viscid sac in which the eggs are deposited.
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Cloudinidae
The cloudinids, an early metazoan family containing the genera Acuticocloudina, Cloudina and Conotubus, lived in the late Ediacaran period and became extinct at the base of the Cambrian. They formed millimetre-scale conical fossils consisting of calcareous cones nested within one another; the appearance of the organism itself remains unknown. The name Cloudina honors the 20th-century geologist and paleontologist Preston Cloud. Cloudinids comprise two genera: Cloudina itself is mineralized, whereas Conotubus is at best weakly mineralized, whilst sharing the same "funnel-in-funnel" construction. Cloudinids had a wide geographic range, reflected in the present distribution of localities in which their fossils are found, and are an abundant component of some deposits. They never appear in the same layers as soft-bodied Ediacaran biota, but the fact that some sequences contain cloudinids and Ediacaran biota in alternating layers suggests that these groups had different environmental preferences. It has been suggested that cloudinids lived embedded in microbial mats, growing new cones to avoid being buried by silt. However no specimens have been found embedded in mats, and their mode of life is still an unresolved question. The classification of the cloudinids has proved difficult: they were initially regarded as polychaete worms, and then as coral-like cnidarians on the basis of what look like buds on some specimens. Current scientific opinion is divided between classifying them as polychaetes and regarding it as unsafe to classify them as members of any broader grouping. Cloudinids are important in the history of animal evolution for two reasons. They are among the earliest and most abundant of the small shelly fossils with mineralized skeletons, and therefore feature in the debate about why such skeletons first appeared in the Late Ediacaran. The most widely supported answer is that their shells are a defense against predators, as some Cloudina specimens from China bear the marks of multiple attacks, which suggests they survived at least a few of them. The holes made by predators are approximately proportional to the size of the Cloudina specimens, and Sinotubulites fossils, which are often found in the same beds, have so far shown no such holes. These two points suggest that predators attacked in a selective manner, and the evolutionary arms race which this indicates is commonly cited as a cause of the Cambrian explosion of animal diversity and complexity.
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Coelom
The coelom is the main body cavity in most animals and is positioned inside the body to surround and contain the digestive tract and other organs.
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Collocyte
Collocyte is a term variously applied in botany and zoology to cells that produce gluey substances, or that bind or capture prey or assorted objects by securing them with gluey materials and structures, or that simply look smooth and gelatinous.
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Common hatchetfish
The common hatchetfish or river hatchetfish (Gasteropelecus sternicla) is a tropical fish belonging to the freshwater hatchetfish family (Gasteropelecidae).
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Common loon
The common loon or great northern diver (Gavia immer) is a large member of the loon, or diver, family of birds.
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Common minke whale
The common minke whale or northern minke whale (Balaenoptera acutorostrata) is a species of minke whale within the suborder of baleen whales.
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Common mudpuppy
The common mudpuppy (Necturus maculosus) is a species of salamander in the genus Necturus.
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Common tern
The common tern (Sterna hirundo) is a seabird in the family Laridae.
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Copepod
Copepods (meaning "oar-feet") are a group of small crustaceans found in the sea and nearly every freshwater habitat.
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Coralliodrilus randyi
Coralliodrilus randyi is a species of clitellate oligochaete worm, first found in Belize, on the Caribbean side of Central America.
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Coralliodrilus rugosus
Coralliodrilus rugosus is a species of clitellate oligochaete worm, first found in Belize, on the Caribbean side of Central America.
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Corallivore
A corallivore is an animal that feeds on coral.
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Criodrilidae
The family Criodrilidae is represented by genus Criodrilus comprising limicolous (mud-dwelling) and/or aquatic earthworms endemic to the Palaearctic currently known only from Europe and Japan, respectively.
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Daisy stingray
The daisy stingray, Dasyatis margarita, is a little-known species of stingray in the family Dasyatidae, found in shallow waters along the coast of West Africa.
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Debate about Cambrian lophotrochozoans
Since 1990 there has been intense debate among paleontologists about the evolution in the Early Cambrian period of the "super-phylum" Lophotrochozoa, which is thought to include the modern molluscs, annelid worms and brachiopods, as well as their evolutionary "aunts" and "cousins".
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Decollate snail
The decollate snail, scientific name Rumina decollata, is a medium-sized predatory land snail, a species of terrestrial pulmonate gastropod mollusk in the family Subulinidae.
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Deepsea skate
The deepsea skate, Bathyraja abyssicola, is a species of softnose skate, family Rajidae, found in deep water from 362 to 2,906 m, usually on the continental slope.
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Dendrodrilus rubidus
Dendrodrilus rubidus is a species of earthworm in the family Lumbricidae.
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Diaguita michaelseni
Diaguita michaelseni is a species of South American earthworm.
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Diatomaceous earth
Diatomaceous earth – also known as D.E., diatomite, or kieselgur/kieselguhr – is a naturally occurring, soft, siliceous sedimentary rock that is easily crumbled into a fine white to off-white powder.
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Digenea
Digenea (Gr. Dis – double, Genos – race) is a class of trematodes in the Platyhelminthes phylum, consisting of parasitic flatworms (known as flukes) with a syncytial tegument and, usually, two suckers, one ventral and one oral.
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Dina parva
Dina parva is an annelid in the Erpobdellidae family.
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Dinophalus taeniatus
Dinophilus taeniatus is 1.5 – 2.5 mm long and about 150 µm wide, and its colour is orange with two distinct dark pigmented eyes on prostomium.
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Diopatra
Diopatra is a genus of polychaete worms in the family Onuphidae.
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Diopatra cuprea
Diopatra cuprea, commonly known as the plumed worm, decorator worm or sometimes ornate worm, is a species of polychaete worm in the family Onuphidae, first described by the French entomologist Louis Augustin Guillaume Bosc in 1802.
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Diplichnites
Diplichnites are arthropod trackways with two parallel rows of blunt to elongate, closely spaced tracks oriented approximately perpendicularly to the mid-line of the trackway.
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Diplocardia
Diplocardia is a genus of North American (USA, Mexico) earthworms with 52-57 known species that is remarkably similar to Australian Diplotrema Spencer, 1900.
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Diplocardia longa
Diplocardia longa is a species of earthworm native to North America.
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Diplocirrus glaucus
Diplocirrus glaucus is a species of marine polychaete found in ocean bottoms often consisting of mud, sand, shells or gravel.
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Diplomystidae
The Diplomystidae, the velvet catfishes, are a family of primitive catfishes endemic to freshwater habitats in Argentina and Chile in southern South America.
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Diurodrilus
Diurodrilus is a genus of tiny marine animals that has traditionally been assigned to the annelid worms, although this affinity is not certain.
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Dodecaceria
Dodecaceria is a genus of marine polychaete worms in the family Cirratulidae.
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Dodecaceria pulchra
Dodecaceria pulchra, commonly known as the black boring worm, is a species of marine polychaete worm in the family Cirratulidae, native to South Africa.
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Domestication
Domestication is a sustained multi-generational relationship in which one group of organisms assumes a significant degree of influence over the reproduction and care of another group to secure a more predictable supply of resources from that second group.
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Dorsal nerve cord
The dorsal nerve cord is a unique feature to chordates, and it is mainly found in the Vertebrata chordate subphylum.
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Dorylus laevigatus
Dorylus laevigatus is a member of the army ant genus Dorylus, or Old World army ants.
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Drawida polydiverticulata
Drawida polydiverticulata is a species of earthworm from family Moniligastridae found from shola grasslands of the Munnar region in Kerala.
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Drawida thomasi
Drawida thomasi is a species of earthworm found from Kakkadampoyil in Kerala.
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Driloleirus
Driloleirus is an earthworm genus in the family Megascolecidae.
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Dudley
Dudley is a large town in the county of West Midlands, England, south-east of Wolverhampton and north-west of Birmingham.
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Earthworm
An earthworm is a tube-shaped, segmented worm found in the phylum Annelida.
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Ecdysozoa
Ecdysozoa is a group of protostome animals, including Arthropoda (insects, chelicerata, crustaceans, and myriapods), Nematoda, and several smaller phyla.
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Echiura
The Echiura, or spoon worms, are a small group of marine animals.
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Echiuroidea
Echiuroidea is an order of annelids in the class Polychaeta.
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Ediacaran biota
The Ediacaran (formerly Vendian) biota consisted of enigmatic tubular and frond-shaped, mostly sessile organisms that lived during the Ediacaran Period (ca. 635–542 Mya).
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Edmond Perrier
Jean Octave Edmond Perrier (9 May 1844 – 31 July 1921) was a French zoologist born in Tulle.
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Edmund Beecher Wilson
Edmund Beecher Wilson (19 October 1856 – 3 March 1939) was a pioneering American zoologist and geneticist.
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Egg
An egg is the organic vessel containing the zygote in which an animal embryo develops until it can survive on its own; at which point the animal hatches.
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Eisenia (annelid)
Eisenia is a genus of earthworm (annelids), named after Svedish scientist Gustav Eisen.
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Eisenia andrei
Eisenia andrei is a close relative of the 'brandling' or 'tiger' worm, Eisenia fetida.
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Eisenia fetida
Eisenia fetida (older spelling: foetida), known under various common names such as redworm, brandling worm, panfish worm, trout worm, tiger worm, red wiggler worm, red californian earth worm, etc., is a species of earthworm adapted to decaying organic material.
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Eleutheroschizonidae
Eleutheroschizonidae is a family of parasites in the order Protococcidiorida.
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Embryogenesis
Embryogenesis is the process by which the embryo forms and develops.
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Emydidae
The Emydidae, commonly called terrapins, pond turtles, or marsh turtles, are a family of turtles.
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Enchytraeidae
The Enchytraeidae are a microdrile oligochaete family.
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Enchytraeus
The genus Enchytraeus includes about 40 species of annelid worms.
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Enchytraeus buchholzi
Enchytraeus buchholzi, Grindal worms, (described by František Vejdovsky in 1879) are enchytraeid oligochaete worms.
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Entoprocta
Entoprocta, whose name means "anus inside", is a phylum of mostly sessile aquatic animals, ranging from long.
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Erinaceusyllis
Erinaceusyllis, previously known as Sphaerosyllis (Claparède, 1863), is a genus belonging to the phylum Annelida, a group known as the segmented worms.
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Erinaceusyllis cirripapillata
Erinaceusyllis cirripapillata is a species belonging to the phylum Annelida, a group known as the segmented worms.
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Erinaceusyllis ettiennei
Erinaceusyllis ettiennei is a species belonging to the phylum Annelida, a group known as the segmented worms.
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Erinaceusyllis hartmannschroederae
Erinaceusyllis hartmannschroederae is a species belonging to the phylum Annelida, a group known as the segmented worms.
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Erinaceusyllis kathrynae
Erinaceusyllis kathrynae is a species belonging to the phylum Annelida, a group known as the segmented worms.
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Ernst Ehlers
Ernst Heinrich Ehlers (11 November 1835 – 31 December 1925) was a German zoologist born in Lüneburg.
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Ernst Haeckel
Ernst Heinrich Philipp August Haeckel (16 February 1834 – 9 August 1919) was a German biologist, naturalist, philosopher, physician, professor, marine biologist, and artist who discovered, described and named thousands of new species, mapped a genealogical tree relating all life forms, and coined many terms in biology, including anthropogeny, ecology, phylum, phylogeny, and Protista. Haeckel promoted and popularised Charles Darwin's work in Germany and developed the influential but no longer widely held recapitulation theory ("ontogeny recapitulates phylogeny") claiming that an individual organism's biological development, or ontogeny, parallels and summarises its species' evolutionary development, or phylogeny.
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Ernst Marcus
Ernst Gustav Gotthelf Marcus (8 June 1893 – 30 June 1968) was a German zoologist, former occupant of the chair of zoology at the University of São Paulo from 1936 to 1963, and co-founder of the Oceanographic Institute of the University of São Paulo.
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Erpobdella
Erpobdella is a genus of leeches in the family Erpobdellidae.
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Erpobdella lahontana
Erpobdella lahontana is an annelid in the Erpobdellidae family.
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Erpobdella lineata
Erpobdella lineata is a leech found in Europe.
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Erpobdella obscura
Erpobdella obscura is a freshwater ribbon leech common in North America.
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Erpobdella octoculata
Erpobdella octoculata is an annelid in the Erpobdellidae family.
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Erpobdella punctata
Erpobdella punctata is a leech in the family Erpobdellidae.
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Erpobdella triannulata
Erpobdella triannulata is an annelid in the Erpobdellidae family.
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Erpobdellidae
Erpobdellidae is a family of leeches.
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Erpobdelliformes
The Erpobdelliformes are one of the currently-accepted suborders of the proboscisless leeches (Arhynchobdellida).
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Errantia
Errantia, occasionally Aciculata, is a subclass of polychaete worms.
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Erythrocruorin
Erythrocruorin is a large oxygen-carrying protein, which has a molecular mass greater than 3.5 million Daltons.
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Escarpia laminata
Escarpia laminata is one of the longest living tube worms that can be found in the cold seeps at a depth of 1000m to 3000m from sea level in the Gulf of Mexico.
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Eudistylia
Eudistylia is a genus of marine polychaete worms.
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Eudistylia polymorpha
Eudistylia polymorpha, the giant feather duster worm, is a species of marine polychaete worm belonging to the family Sabellidae.
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Eudrilidae
The Eudrilidae are a family of earthworms, mostly of Africa.
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Eudrilus eugeniae
Eudrilus eugeniae is a species of earthworm native to tropical west Africa and now widespread in warm regions, both wild and under vermicompost, also called the African night crawler.
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Euhirudinea
Euhirudinea, the true leeches, are an infraclass of the Hirudinea.
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Eulagisca
Eulagisca is a genus of marine Polychaete worms belonging to the family Polynoidae.
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Eulalia (annelid)
Eulalia is a genus of polychaete worms.
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Eulalia clavigera
Eulalia clavigera is a species of polychaete worm in the family Phyllodocidae, native to the coasts around Britain, through Western France, and to the Iberian Peninsular.
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Eulalia viridis
Eulalia viridis is a species of bright-green polychaete worm in the family Phyllodocidae.
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Eumetazoa
Eumetazoa (Greek: εὖ, well + μετά, after + ζῷον, animal) or '''Diploblasts''', or Epitheliozoa, or Histozoa are a proposed basal animal clade as sister group of the Porifera.
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Eunice (annelid)
Eunice is a genus in the polychaete family Eunicidae.
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Eunice aphroditois
Eunice aphroditois (colloquially known as the Bobbit(t) worm or sand striker) is an aquatic predatory polychaete worm dwelling at the ocean floor.
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Eunice norvegica
Eunice norvegica is an aquatic polychaete worm found in deep water on the seabed of the northern Atlantic Ocean as well as in the Pacific and Indian Oceans.
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Eunicida
Eunicida is an order of polychaete worms.
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Eunicidae
Eunicidae is a family of polychaetes.
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Euphrosinidae
The Euphrosinidae are a family of polychaete worms.
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Eupolymnia crasscornis
Eupolymnia crasscornis is a tropical species of annelid, commonly known as a spaghetti worm.
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Eupolymnia nebulosa
Eupolymnia nebulosa is a species of sedentary marine polychaete worm in the Terebellidae family.
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Eurasian rock pipit
The Eurasian rock pipit (Anthus petrosus), or just rock pipit, is a species of small passerine bird that breeds in western Europe on rocky coasts.
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European nightcrawler
The European nightcrawler, Eisenia hortensis or Dendrobaena veneta, is a medium-small earthworm averaging about 1.5 grams each when fully grown.
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Eveline Du Bois-Reymond Marcus
Eveline du Bois-Reymond Marcus (6 October 1901 – 31 January 1990) was a German zoologist and drawer.
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Evolution of molluscs
The evolution of the molluscs is the way in which the Mollusca, one of the largest groups of invertebrate animals, evolved.
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Evolution of the eye
The evolution of the eye is attractive to study, because the eye distinctively exemplifies an analogous organ found in many animal forms.
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Evolutionary developmental biology
Evolutionary developmental biology (informally, evo-devo) is a field of biological research that compares the developmental processes of different organisms to infer the ancestral relationships between them and how developmental processes evolved.
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Evolutionary history of life
The evolutionary history of life on Earth traces the processes by which both living organisms and fossil organisms evolved since life emerged on the planet, until the present.
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Extracellular digestion
Extracellular digestion is a process in which saprobionts feed by secreting enzymes through the cell membrane onto the food.
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Eye
Eyes are organs of the visual system.
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False scad
The false scad (Caranx honchos), also known as the spotfin scad, ten-finned horse mackerel and yellow horse mackerel, is a species of medium-sized marine fish classified in the jack family Carangidae.
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FAM185A
The FAM185A (Gene Family with sequence similarity 185, member A) is a protein that in humans is encoded by the FAM185A gene.
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Fauna of Australia
The fauna of Australia consists of a huge variety of animals; some 83% of mammals, 89% of reptiles, 24% of fish and insects and 93% of amphibians that inhabit the continent are endemic to Australia.
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Fauna of Ireland
The fauna of Ireland comprises all the animal species inhabiting the island of Ireland and its surrounding waters.
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Fauna of Italy
Italy has the highest level of faunal biodiversity in Europe, with over 57,000 species recorded, representing more than a third of all European fauna.
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Fauna of Puerto Rico
The fauna of Puerto Rico is similar to other island archipelago faunas, with high endemism, and low, skewed taxonomic diversity.
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Fauna of the Republic of Macedonia
The fauna of the Republic of Macedonia has a complex zoogeographical structure.
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Fezouata Formation
The Upper and Lower Fezouata Formations of Morocco are Burgess shale-type deposits dating to the Early Ordovician, filling an important preservational window between the common Cambrian Lagerstätten and the Late Ordovician Soom Shale.
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FGFR1OP2
Fibroblast growth factor receptor oncogene partner 2 (FGFR1OP2) was identified in a study on myeloproliferative syndrome (EMS).
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Ficopomatus enigmaticus
Ficopomatus enigmaticus, commonly known as the Australian tubeworm,ten Hove, H., et al.
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Filograna
Filograna is a genus of marine polychaete worms in the family Serpulidae.
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Fire-bellied toad
The fire-bellied toads or fire belly toads are a group of eight species of small toads (most species typically no longer than) belonging to the genus Bombina.
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Flame cell
A flame cell is a specialized excretory cell found in the simplest freshwater invertebrates, including flatworms (except the turbellarian order Acoela), rotifers and nemerteans; these are the simplest animals to have a dedicated excretory system.
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Flathead catfish
The flathead catfish (Pylodictis olivaris), also called by several names including mudcat or shovelhead cat, is a large species of North American freshwater catfish.
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Flatworm
The flatworms, flat worms, Platyhelminthes, Plathelminthes, or platyhelminths (from the Greek πλατύ, platy, meaning "flat" and ἕλμινς (root: ἑλμινθ-), helminth-, meaning "worm") are a phylum of relatively simple bilaterian, unsegmented, soft-bodied invertebrates.
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FMRFamide
FMRFamide (Phe-Met-Arg-Phe) is a neuropeptide from a broad family of FMRFamide-related peptides (FaRPs) all sharing an -RFamide sequence at their C-terminus.
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Follicle (anatomy)
A follicle is a small spherical or vase-like group of cells enclosing a cavity in which some other structure grows or other material is contained.
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Fossils of the Burgess Shale
The fossils of the Burgess Shale, like the Burgess Shale itself, formed around in the Mid Cambrian period.
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Fragmentation (reproduction)
Fragmentation or clonal fragmentation in multi cellular or colonial organisms is a form of asexual reproduction or cloning in which an organism is split into fragments.
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Francisco Torrent-Guasp
Francisco ("Paco") Torrent-Guasp (Gandia, 1931 - Madrid, 2005).
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Frank Evers Beddard
Frank Evers Beddard FRS FRSE (19 June 1858 – 14 July 1925) was an English zoologist.
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Fridericia (animal)
Fridericia is a genus of Annelids of the family Enchytraeidae.
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Frog
A frog is any member of a diverse and largely carnivorous group of short-bodied, tailless amphibians composing the order Anura (Ancient Greek ἀν-, without + οὐρά, tail).
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Galeichthys ater
Galeichthys ater, the Black sea catfish, is a species of sea catfish found in South Africa and Namibia.
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Galeolaria
Galeolaria is a genus of tube-building annelid fanworms in the family Serpulidae, found from southern Queensland, to southern Australian shores, to Western Australia.
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Galeolaria hystrix
Galeolaria hystrix is a serpulid worm of the family Serpulidae, endemic to southern Australia and New Zealand.
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Gatty Marine Laboratory
The Gatty Marine Laboratory is a science facility located in the coastal town of St Andrews in Fife, Scotland.
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Gelatinous zooplankton
Gelatinous zooplankton are fragile animals that live in the water column in the ocean.
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Giant Gippsland earthworm
The giant Gippsland earthworm, Megascolides australis, is one of Australia's 1,000 native earthworm species.
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Global biodiversity
Global biodiversity is the measure of biodiversity on planet Earth and is defined as the total variability of life forms.
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Globin
The globins are a superfamily of heme-containing globular proteins, involved in binding and/or transporting oxygen.
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Glomerula
Glomerula is a genus of polychaete worm in the family Sabellidae.
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Glossiphoniidae
Glossiphoniidae are the family called freshwater jawless leeches or glossiphoniids.
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Glossoscolecidae
The Glossoscolecidae are a large family of earthworms which has native representatives in South and Central America.
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Glossy ibis
The glossy ibis (Plegadis falcinellus) is a wading bird in the ibis family Threskiornithidae.
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Glycera (annelid)
The genus Glycera is a group of polychaetes (bristle worms) commonly known as bloodworms.
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Glyceridae
Glyceridae is a family of polychaete worms.
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Glyphidrilus
Glyphidrilus is a genus of semi-aquatic freshwater earthworms in the family Almidae.
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Golden lined whiting
The golden lined whiting, Sillago analis (also known as the Tin Can Bay whiting or rough-scale whiting), is a species of inshore marine fish of the smelt whiting family, Sillaginidae that inhabits the coastlines of northern Australia and lower Papua New Guinea.
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Grania
Grania is a genus of marine annelid worms in the class Clitellata.
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Greater sand plover
The greater sand plover (Charadrius leschenaultii) is a small wader in the plover family of birds.
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Green sturgeon
The green sturgeon (Acipenser medirostris) is a species of sturgeon native to the Pacific Ocean, from China and Russia, over into Canada and the United States.
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Green swordtail
The green swordtail (Xiphophorus hellerii) is a species of freshwater/brackish fish in family Poeciliidae of order Cyprinodontiformes.
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Gregarinasina
The gregarines are a group of Apicomplexan alveolates, classified as the Gregarinasina or Gregarinia.
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Hac1 Xbp1 intron
The Hac1 Xbp1 intron is a non-canonical intron, spliced from bZIP-containing genes called HAC1 in Fungi and XBP1 in Metazoa.
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Haemadipsa
Haemadipsa is a genus of leeches, with members commonly known as jawed land leeches.
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Haemadipsa picta
Haemadipsa picta (common names: tiger leech, or less commonly, stinging land leech) is a large (up to 33 mm long) terrestrial leech found in Borneo, Indochina, and Taiwan.
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Haemadipsidae
Haemadipsidae (From Latin "haima" and "dipsa" ("blood" and "thirst", respectively))Google Translate - September 2013 are a family of "jawed leeches".
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Haementeria ghilianii
Haementeria ghilianii, the giant Amazon leech, is one of the world's largest species of leeches.
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Haemopis sanguisuga
Haemopis sanguisuga, commonly called the horse-leech, is a species of leech in the genus Haemopis.
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Halkieriid
The halkieriids are a group of fossil Molluscs (see Calvapilosa) from the Lower to Middle Cambrian.
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Halwaxiida
Halwaxiida or halwaxiids is a proposed clade equivalent to the older orders Sachitida He 1980 and Thambetolepidea Jell 1981, loosely uniting scale-bearing Cambrian animals, which may lie in the stem group to molluscs or lophotrochozoa.
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Haplodrili
Haplodrili, or Archiannelida, is an order of primitive polychaete worms.
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Haplosyllis spongicola
Haplosyllis spongicola, the sponge worm, is a species of polychaete worm in the family Syllidae.
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Haplotaxida
The Haplotaxida are one of two orders within the annelid subclass Oligochaeta, the other being the Lumbriculida.
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Hardhead catfish
The hardhead catfish (Ariopsis felis) is a species of sea catfish from the northwest Atlantic and Gulf of Mexico, and similar to the gafftopsail catfish (Bagre marinus).
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Harike Wetland
Harike Wetland also known as "Hari-ke-Pattan", with the Harike Lake in the deeper part of it, is the largest wetland in northern India in the border of Tarn Taran Sahib district and Ferozepur district of the Punjab state in India.
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Harmothoe
Harmothoe is a genus of marine Polychaete worms belonging to the family Polynoidae.
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Harold John Finlay
Harold John Finlay (22 March 1901 – 7 April 1951) was a New Zealand palaeontologist and conchologist.
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Hediste diversicolor
Hediste diversicolor, commonly known as a ragworm, is a polychaete worm in the family Nereidae.
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Helminths
Helminths, also commonly known as parasitic worms, are large multicellular parasites, which can generally be seen with the naked eye when they are mature.
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Helobdella
Helobdella is a genus of leeches in the family Glossiphoniidae, the freshwater jawless leeches.
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Helobdella robusta
Helobdella robusta is a leech of the family glossiphoniidae.
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Hematophagy
Hematophagy (sometimes spelled haematophagy or hematophagia) is the practice by certain animals of feeding on blood (from the Greek words αἷμα haima "blood" and φάγειν phagein "to eat").
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Hemerythrin
Hemerythrin (also spelled haemerythrin; blood, red) is an oligomeric protein responsible for oxygen (O2) transport in the marine invertebrate phyla of sipunculids, priapulids, brachiopods, and in a single annelid worm genus, Magelona.
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Hemibdella soleae
Hemibdella soleae is a marine species of leech in the family Piscicolidae and the type taxon of its genus.
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Hemoglobin
Hemoglobin (American) or haemoglobin (British); abbreviated Hb or Hgb, is the iron-containing oxygen-transport metalloprotein in the red blood cells of all vertebrates (with the exception of the fish family Channichthyidae) as well as the tissues of some invertebrates.
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Heronidrilus gravidus
Heronidrilus gravidus is a species of clitellate oligochaete worm, first found in Belize, on the Caribbean side of Central America.
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Herring
Herring are forage fish, mostly belonging to the family Clupeidae.
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Hesiocaeca methanicola
Hesiocaeca methanicola is a species of polychaete worm that inhabits methane clathrate deposits in the ocean floor.
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Hesionidae
Hesionidae are a family of phyllodocid "bristle worms" (class Polychaeta).
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Hesioninae
Hesioninae are a subfamily of phyllodocid "bristle worms" (class Polychaeta).
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Heterodrilus flexuosus
Heterodrilus flexuosus is a species of clitellate oligochaete worm, first found in Belize, on the Caribbean side of Central America.
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Heterodrilus modestus
Heterodrilus modestus is a species of clitellate oligochaete worm, first found in Belize, on the Caribbean side of Central America.
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Heterodrilus rarus
Heterodrilus rarus is a species of clitellate oligochaete worm, first found in Belize, on the Caribbean side of Central America.
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Hirudinidae
Hirudinidae is a family of leeches.
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Hirudiniformes
The Hirudiniformes are one of the currently-accepted suborders of the proboscisless leeches (Arhynchobdellida).
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Hirudo
Hirudo is a genus of leeches of the family Hirudinidae.
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Hirudo medicinalis
Hirudo medicinalis, the European medicinal leech, is one of several species of leeches used as "medicinal leeches".
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Hirudo orientalis
Hirudo orientalis is a species of medicinal leech.
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Hirudo sulukii
Hirudo sulukii is a species of leech that has been found from Kara Lake of Adiyaman, Sülüklü Lake of Gaziantep and Segirkan wetland of Batman in Turkey.
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Hirudo verbana
Hirudo verbana is a species of leech.
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Hirudobdella antipodum
Hirudobdella antipodum is a terrestrial leech found only on the Open Bay Islands in New Zealand.
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Hjalmar Kinberg
Johan Gustaf Hjalmar Kinberg (13 May 1820 – 29 August 1908) was a Swedish zoologist, physician and veterinarian who was born in Grönby, near Trelleborg, Skåne County and who died in St.
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How the Snake Lost Its Legs
How the Snake Lost Its Legs: Curious Tales from the Frontier of Evo-Devo is a 2014 book on evolutionary developmental biology by Lewis I. Held, Jr. The title pays homage to Rudyard Kipling's Just So Stories, but the "tales" are strictly scientific, explaining how a wide range of animal features evolved, in molecular detail.
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Hrabea
Hrabea ogumai is a species of oligochaete worm originally described by Yamaguchi in 1936 from specimens collected from subterranean waters in Sapporo.
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Hudson River
The Hudson River is a river that flows from north to south primarily through eastern New York in the United States.
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Humphead wrasse
The humphead wrasse (Cheilinus undulatus) is a species of wrasse mainly found on coral reefs in the Indo-Pacific region.
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Hydroides
Hydroides is a genus of tube-forming serpulid worms found on submerged saltwater rocks, shells, and boats in many coastal areas around the world.
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Hydroides elegans
Hydroides elegans is a species of tube-forming serpulid worms.
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Hydroides norvegica
Hydroides norvegica is a species of tube-forming annelid worm in the family Serpulidae.
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Hydrothermal vent
A hydrothermal vent is a fissure in a planet's surface from which geothermally heated water issues.
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Hydrozoa
Hydrozoa (hydrozoans, from ancient Greek ὕδρα, hydra, "sea serpent" and ζῷον, zoon, "animal") are a taxonomic class of individually very small, predatory animals, some solitary and some colonial, most living in salt water.
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Hyolithellus
Hyolithellus is a conical tubular fossil from the Cambrian, originally considered a hyolith but since has been reinterpreted (tentatively) as an annelid worm.
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Hyphessobrycon
Hyphessobrycon is a genus of freshwater fish in the family Characidae.
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Ice worm
Ice worms (also written as ice-worms or iceworms) are enchytraeid annelids of the genus Mesenchytraeus.
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Illinois Natural History Survey
The Illinois Natural History Survey (abbreviated as INHS), located on the campus of the University of Illinois at Urbana-Champaign in Champaign, Illinois, is an active research institution with over 200 staff members, and it maintains one of the largest State-operated museums in the United States, with collections totaling over 9.5 million specimens of amphibians, annelids, birds, crustaceans, fish, fungi, insects, mammals, mollusks, plants, and reptiles from around the world.
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Inanidrilus
Inanidrilus is a genus of marine annelid worms.
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Inanidrilus aduncosetis
Inanidrilus aduncosetis is a species of annelid worm.
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Inanidrilus belizensis
Inanidrilus belizensis is a species of annelid worm.
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Inanidrilus bonomii
Inanidrilus bonomii is a species of annelid worm.
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Inanidrilus bulbosus
Inanidrilus bulbosus is a species of annelid worm.
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Inanidrilus carterensis
Inanidrilus carterensis is a species of annelid worm.
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Inanidrilus ernesti
Inanidrilus ernesti is a species of annelid worm.
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Inanidrilus extremus
Inanidrilus extremus is a species of annelid worm.
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Inanidrilus falcifer
Inanidrilus falcifer is a species of annelid worm.
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Inanidrilus fijiensis
Inanidrilus fijiensis is a species of annelid worm.
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Inanidrilus gustavsoni
Inanidrilus gustavsoni is a species of annelid worm.
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Inanidrilus leukodermatus
Inanidrilus leukodermatus is a species of annelid worm.
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Inanidrilus manae
Inanidrilus manae is a species of annelid worm.
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Inanidrilus mexicanus
Inanidrilus mexicanus is a species of annelid worm.
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Inanidrilus renaudae
Inanidrilus renaudae is a species of annelid worms.
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Inanidrilus scalprum
Inanidrilus scalprum is a species of annelid worm.
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Inanidrilus speroi
Inanidrilus speroi is a species of annelid worm.
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Inanidrilus triangulatus
Inanidrilus triangulatus is a species of annelid worm.
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Inanidrilus vacivus
Inanidrilus vacivus is a species of annelid worm.
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Inanidrilus wasseri
Inanidrilus wasseri is a species of annelid worm.
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Indian Wild Ass Sanctuary
Indian Wild Ass Sanctuary also known as the Wild Ass Wildlife Sanctuary is located in the Little Rann of Kutch in the Gujarat state of India.
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Indiana Dunes National Lakeshore
Indiana Dunes National Lakeshore is a unit of the National Park System designated as a U.S. National Lakeshore located in northwest Indiana and managed by the National Park Service.
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Inversion (evolutionary biology)
In evolutionary developmental biology, inversion refers to the hypothesis that during the course of animal evolution, the structures along the dorsoventral (DV) axis have taken on an orientation opposite that of the ancestral form.
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Invertebrate
Invertebrates are animals that neither possess nor develop a vertebral column (commonly known as a backbone or spine), derived from the notochord.
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Invertebrate paleontology
Invertebrate paleontology (also spelled Invertebrate palaeontology) is sometimes described as Invertebrate paleozoology or Invertebrate paleobiology.
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Isomer (Proarticulata)
Isomer (Greek isos.
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IUCN Red List critically endangered species (Animalia)
As of 30 August 2014, the IUCN Red List of Threatened Species has identified 2599 critically endangered species, subspecies, stocks and subpopulations in the Animalia kingdom.
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IUCN Red List data deficient species (Annelida)
On 29 January 2010, the IUCN Red List of Threatened Species identified 1 data deficient species in the Annelida phylum (Animalia kingdom).
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IUCN Red List near threatened species (Animalia)
On 29 January 2010, the IUCN Red List of Threatened Species identified 2657 near threatened species, subspecies, stocks and sub-populations in the Animalia kingdom.
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IUCN Red List vulnerable species (Animalia)
On 30 January 2010, the IUCN Red List of Threatened Species identified 4618 Vulnerable species, subspecies and varieties, stocks and sub-populations in the Animalia kingdom.
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Jabba the Hutt
Jabba Desilijic Tiure,"Jabba", in Sansweet, Star Wars Encyclopedia, pp.
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James A. Lake
James A. Lake (born August 10, 1941, Kearney, Nebraska) is an American evolutionary biologist and a Distinguished Professor of Molecular, Cell, and Developmental Biology and of Human Genetics at UCLA.
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Janua
Janua is a genus of polychaetes, containing the following subgenera and species:;Dexiospira Caullery & Mesnil, 1897.
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Janua pagenstecheri
Janua pagenstecheri is a species of marine polychaete.
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Jasmineira
Jasmineira is a genus of polychaetes.
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Jasmineira elegans
Jasmineira elegans is a species of polychaetes.
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Jean Hanson
Emmeline Jean Hanson (14 November 1919 – 10 August 1973), commonly known by her middle name Jean, was a biophysicist and zoologist known for her contributions to muscle research.
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Jean Louis Armand de Quatrefages de Bréau
Jean Louis Armand de Quatrefages de Bréau (10 February 1810 – 12 January 1892) was a French biologist.
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Jean-Baptiste Lamarck
Jean-Baptiste Pierre Antoine de Monet, Chevalier de Lamarck (1 August 1744 – 18 December 1829), often known simply as Lamarck, was a French naturalist.
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Jeanne Renaud-Mornant
Jeanne Renaud-Mornant, Born Jeanne Renaud, Jeanne Renaud-Debyser before her second marriage (8 August, 1925 Vellexon - 18 September, 2012, Paris) was a French biologist specialising in meiofauna.
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Joseph Richard Pawlik
Joseph Richard Pawlik is a marine biologist.
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Kagu
The kagu or cagou (Rhynochetos jubatus) is a crested, long-legged, and bluish-grey bird endemic to the dense mountain forests of New Caledonia.
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Katharine Jeannette Bush
Katharine Jeannette Bush (December 30, 1855 – January 19, 1937) was an American zoologist.
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Kenyon cell
Kenyon cells are the intrinsic neurons of the mushroom body, a neuropil found in the brains of most arthropods and some annelids.
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Kinabalu giant earthworm
The Kinabalu giant earthworm, Pheretima darnleiensis, is a grey-blue coloured peregrine annelid.
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Kinabalu giant red leech
The Kinabalu giant red leech (Mimobdella buettikoferi) is a large bright orange-red coloured leech that is endemic to Mount Kinabalu, Borneo.
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Kingfisher
Kingfishers or Alcedinidae are a family of small to medium-sized, brightly colored birds in the order Coraciiformes.
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Kinosternidae
The Kinosternidae are a family of mostly small turtles that includes the mud turtles and musk turtles.
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Kootenayscolex
Kootenayscolex, the bristle-headed worm, is a 500 million year old fossil species of proto-annelid resembling a bristle worm, found in British Columbia in 2012.
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Kryptotrochozoa
The Kryptotrochozoa are a proposed Lophotrochozoa clade.
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Kuala Selangor Nature Park
The Kuala Selangor Nature Park (KSNP; Taman Alam Kuala Selangor) is a park located by the mouth of Selangor River in Kuala Selangor District, Selangor, Malaysia.
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Kunstformen der Natur
Kunstformen der Natur (known in English as Art Forms in Nature) is a book of lithographic and halftone prints by German biologist Ernst Haeckel.
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Kuphus
Kuphus is a genus of shipworms, marine bivalve molluscs in the family Teredinidae.
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Kurile Lake
Kurile Lake (Кури́льское о́зеро) is a caldera and crater lake in Kamchatka, Russia.
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Lagis koreni
Lagis koreni, commonly known as the trumpet worm, is a species of marine polychaete worm found in European waters.
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Lake Baikal
Lake Baikal (p; Байгал нуур, Baigal nuur; Байгал нуур, Baigal nuur, etymologically meaning, in Mongolian, "the Nature Lake") is a rift lake in Russia, located in southern Siberia, between Irkutsk Oblast to the northwest and the Buryat Republic to the southeast.
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Lake Tanganyika
Lake Tanganyika is an African Great Lake.
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Lamellibrachia
Lamellibrachia is a genus of tube worms related to the giant tube worm, Riftia pachyptila.
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Lamellibrachia barhami
Lamellibrachia barhami is a large pogonophore.
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Lamellibrachia luymesi
Lamellibrachia luymesi is a species of tube worms in the family Siboglinidae.
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Lanice
Lanice, (also known as the sand mason worm), is a genus of burrowing marine polychaetes (commonly referred to as "bristle worms") typically found in the littoral zone.
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Lanice conchilega
Lanice conchilega, commonly known as the sand mason worm, is a species of burrowing marine polychaete worm.
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Largest organisms
The largest organisms found on Earth can be determined according to various aspects of an organism's size, such as: mass, volume, area, length, height, or even genome size.
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Larva
A larva (plural: larvae) is a distinct juvenile form many animals undergo before metamorphosis into adults.
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Las Hoyas
Las Hoyas is a Cretaceous Konservat-Lagerstätten located near the city of Cuenca, Spain.
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Lateral heart
Lateral hearts, also known as pseudohearts or commissural vessels, are blood vessels on either side of the alimentary canal of some annelids that pump blood from the dorsal vessel to the ventral vessel.
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Léon Gaston Seurat
Léon Gaston Seurat (born 1872) was a French zoologist and parasitologist known for his investigations of fauna native to French Polynesia and North Africa.
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Léon Vaillant
Léon Louis Vaillant (11 November 1834 – 24 November 1914) was a French zoologist.
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Le Règne Animal
Le Règne Animal (The Animal Kingdom) is the most famous work of the French naturalist Georges Cuvier.
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Leech
Leeches are segmented parasitic or predatory worm-like animals that belong to the phylum Annelida and comprise the subclass Hirudinea.
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Lepidasthenia
Lepidasthenia is a genus of scaled Polychaete worms in the family Polynoidae.
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Lepidasthenia elegans
Lepidasthenia elegans is a species of scaled Polychaete worms in the family Polynoidae.
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Lesser sand plover
The lesser sand plover (Charadrius mongolus) is a small wader in the plover family of birds.
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Ligérian
The Ligérian is a regional geological substage of the Turonian.
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Limnodriloides adversus
Limnodriloides adversus is a species of clitellate oligochaete worm, first found in Belize, on the Caribbean side of Central America.
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Limnodriloides anxius
Limnodriloides anxius is a species of clitellate oligochaete worm, first found in Belize, on the Caribbean side of Central America.
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Limnodriloides major
Limnodriloides major is a species of clitellate oligochaete worm, first found in Belize, on the Caribbean side of Central America.
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Limnodriloides sacculus
Limnodriloides sacculus is a species of clitellate oligochaete worm, first found in Belize, on the Caribbean side of Central America.
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Limnodrilus hoffmeisteri
Limnodrilus hoffmeisteri, also known as red worm, is one of the most widespread and abundant oligochaetes in the world.
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Liometopum apiculatum
Liometopum apiculatum is a species of ant in the subfamily Dolichoderinae.
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List of animal classes
The following is a list of the classes in each phylum of the kingdom Animalia.
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List of annelid families
List of annelid families describes the taxa relationships in the phylum Annelida, which contains more than 17,000 extant species including ragworms, earthworms, and leeches.
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List of Annelida of Ireland
This is a list of the Annelida recorded from Ireland.
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List of bilateral animal orders
List of bilateral animal orders contains the Bilateria of the animal subkingdom Eumetazoa, divided into four superphyla, Deuterostomia, and the three Protostome superphyla, Ecdysozoa, and the two Spiralia superphyla, Platyzoa and Lophotrochozoa.
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List of bioluminescent organisms
Bioluminescence is the production of light by living organisms.
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List of birds of Korea
This is a list of all birds recorded in the wild in the Korean Peninsula and its islands.
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List of critically endangered invertebrates
As of July 2016, the International Union for Conservation of Nature (IUCN) lists 987 critically endangered invertebrate species, including 206 which are tagged as possibly extinct.
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List of cutaneous conditions
Many conditions affect the human integumentary system—the organ system covering the entire surface of the body and composed of skin, hair, nails, and related muscle and glands.
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List of data deficient invertebrates
As of July 2016, the International Union for Conservation of Nature (IUCN) lists 5278 data deficient invertebrate species.
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List of invasive species in South Africa
This is a list of invasive species in South Africa, including invasive species of plants, animals, and other organisms in South Africa.
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List of invertebrates of California
This list of invertebrates of California lists invertebrate species (animals without a backbone) that are found in the US State of California.
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List of Latin words with English derivatives
This is a list of Latin words with derivatives in English (and other modern languages).
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List of Lessepsian migrant species
Lessepsian migrants, named after Ferdinand de Lesseps, the French engineer in charge of the Suez Canal's construction, are marine species that are native to the waters on one side of the Suez Canal, and which have been introduced by passage through the canal to the waters on its other side, giving rise to new colonies there and often becoming invasive.
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List of longest-living organisms
This is a list of the longest-living organisms; that is, the individuals (in some instances, clones) of a species.
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List of marine aquarium invertebrate species
This is a list of various species of marine invertebrates, animals without a backbone, that are commonly found in aquariums kept by hobby aquarists.
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List of MeSH codes (B01)
The following is a list of the "B01" codes of MeSH.
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List of prehistoric annelid genera
This list of prehistoric annelids is an attempt to create a comprehensive listing of all genera that have ever been included in Annelida which have been found preserved as fossils.
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List of recently extinct invertebrates
As of July 2016, the International Union for Conservation of Nature (IUCN) lists 394 extinct species, 206 possibly extinct species, 16 extinct in the wild species, eight extinct subspecies, and five extinct in the wild subspecies of invertebrate.
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List of reptiles of Guatemala
This is a list reptiles in Guatemala, including snakes, lizards, crocodilians, and turtles.
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List of Sites of Special Scientific Interest in Buckinghamshire
Buckinghamshire is a county in south-east England.
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List of species described in 2015
List of species formally described and other new taxa of organism in 2015 classified by time of publication.
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List of symbiotic relationships
Symbiosis can vary between mutualism, commensalism, and parasitism, though these grade into each other,.
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List of vulnerable invertebrates
As of July 2016, the International Union for Conservation of Nature (IUCN) lists 2178 vulnerable invertebrate species.
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Listriolobus pelodes
Listriolobus pelodes is a species of marine spoon worm.
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Lists of animals
Animals are multicellular eukaryotic organisms that form the biological kingdom Animalia.
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Lists of IUCN Red List data deficient species
On 29 January 2010, the IUCN Red List of Threatened Species identified 6,702 (5,913 Animalia (1 Annelida, 1,328 Arthropoda, 3,814 Chordata, 149 Cnidaria, 617 Mollusca, 3 Nemertina, 1 Onychophora), 780 Plantae, 9 Protista) data deficient species.
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Lopadorrhynchidae
Lopadorrhynchidae is a family of polychaete worms.
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Lophophorata
The Lophophorata are a Lophotrochozoan clade consisting of the Brachiozoa and the Bryozoa.
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Lophophore
The lophophore is a characteristic feeding organ possessed by four major groups of animals: the Brachiopoda, Bryozoa, Hyolitha, and Phoronida, which collectively constitute the protostome group Lophophorata.
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Lophotrochozoa
Lophotrochozoa ("crest/wheel animals") is a clade of protostome animals within the Spiralia.
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Ludlow Group
The Ludlow Group are geologic formations deposited during the Ludlow epoch of the Silurian period in the British Isles, in areas of England, Ireland, Scotland, and Wales.
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Lugworm
The lugworm or sandworm (Arenicola marina) is a large marine worm of the phylum Annelida.
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Lumbricidae
The Lumbricidae are a family of earthworms which includes most of the earthworm species well-known to Europeans.
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Lumbriculidae
The Lumbriculidae are a family of microdrile oligochaetes common in freshwater environments, including streams, lakes, marshes, wells and groundwater.
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Lumbriculus
Lumbriculus is a genus of Annelid oligochaetes.
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Lumbriculus ambiguus
Lumbriculus ambiguus was described by Holmquist in 1976, based on material collected in northern Alaska.
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Lumbriculus genitosetosus
Lumbriculus genitosetosus was described by Holmquist in 1976 from almost 2,000 individuals collected in Northern Alaska.
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Lumbriculus illex
Lumbriculus illex is a fresh-water worm, the most recently described member of the genus (Timm & Rodriguez, 1994), and is known only from 3 individuals found in Komarovka stream, north of Vladivostok.
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Lumbriculus japonicus
Lumbriculus japonicus is an oligochaete originally described by Yamaguchi in 1936 from locations on Hokkaidō.
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Lumbriculus kareliensis
Lumbriculus kareliensis, an Annelid worm, was described by Popchenko in 1976 from material collected in Karelia.
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Lumbriculus mukoensis
Lumbriculus mukoensis was described by Yamaguchi in 1953 from specimens collected at Muko in Hyōgo Prefecture, Japan.
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Lumbriculus multiatriatus
Lumbriculus multiatriatus was described by Yamaguchi in 1937 from several specimens from Sakhalin and Hokkaidō.
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Lumbriculus variegatus
Lumbriculus variegatus, also known as the blackworm or California blackworm, is a species of worm inhabiting North America and Europe.
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Lumbricus
Lumbricus contains some of the most commonly seen earthworms in Europe.
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Lumbricus badensis
Lumbricus badensis is a type of giant earthworm, a species of annelid.
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Lumbricus rubellus
Lumbricus rubellus is a species of earthworm that is related to Lumbricus terrestris.
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Lumbricus terrestris
Lumbricus terrestris is a large, reddish worm species widely distributed around the world (along with several other lumbricids).
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Lumbrineris latreilli
Lumbrineris latreilli is an annelid discovered by Jean Victoire Audouin and Henri Milne-Edwards in 1834.
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Lutodrilus
Lutodrilus is a genus of invertebrate in the Lutodrilidae family.
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Lutodrilus multivesiculatus
Lutodrilus multivesiculatus is a species of invertebrate in the Lutodrilidae family.
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Lysidice (annelid)
Lysidice is a genus of polychaete worms in the family Eunicidae.
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Machaeridian
Machaeridia is an extinct group of armoured, segmented annelid worms, known from the Early Ordovician (Late Tremadoc) to Carboniferous.
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Macrochaeta natalensis
Macrochaeta natalensis is an polychaete which belongs to the Acrocirridae family.
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Maggot
A maggot is the larva of a fly (order Diptera); it is applied in particular to the larvae of Brachycera flies, such as houseflies, cheese flies, and blowflies, rather than larvae of the Nematocera, such as mosquitoes and Crane flies.
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Marine biology
Marine biology is the scientific study of marine life, organisms in the sea.
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Marine invertebrates
Marine invertebrates are the invertebrates that live in marine habitats.
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Marine life
Marine life, or sea life or ocean life, is the plants, animals and other organisms that live in the salt water of the sea or ocean, or the brackish water of coastal estuaries.
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Marine worm
Any worm that lives in a marine environment is considered a marine worm.
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Marywadea
Marywadea is a genus of Ediacaran biota shaped like an oval with a central ridge.
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Matanuska Formation
The Matanuska Formation consists of more than of sedimentary strata exposed in the northern Chugach Mountains, Matanuska Valley, and southern Talkeetna Mountains of South-Central Alaska.
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Maupasia
Maupasia is a genus of polychaete worms.
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Maurice Caullery
Maurice Jules Gaston Corneille Caullery (5 September 1868, Bergues – 13 July 1958, Paris) was a French biologist.
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Mauritanian shortface eel
The Mauritanian shortface eel (Panturichthys mauritanicus) is an eel in the family Heterenchelyidae (mud eels).
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Maxilla (arthropod mouthpart)
In arthropods, the maxillae (singular maxilla) are paired structures present on the head as mouthparts in members of the clade Mandibulata, used for tasting and manipulating food.
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Meat ant
The meat ant (Iridomyrmex purpureus), also known as the gravel ant or southern meat ant, is a species of ant endemic to Australia.
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Megascolecidae
The Megascolecidae are a large family of earthworms which has native representatives in Australia, New Zealand, both Southeast and East Asia, and North America.
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Mesenchytraeus harrimani
Mesenchytraeus harrimani is an ice worm, named after E. H. Harriman.
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Mesenchytraeus solifugus
Mesenchytraeus solifugus is a species of Oligochaete worms commonly called ice worms that inhabits coastal glaciers in the North Western portion of North America.
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Mesonerilla
Mesonerilla is a genus of polychaetes in the Nerillidae family.
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Mesonerilla prospera
Mesonerilla prospera is a species of invertebrate in the Nerillidae family endemic to Bermuda.
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Mesozoa
The Mesozoa (singular: mesozoon) are minuscule, worm-like parasites of marine invertebrates.
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Metalloprotein
Metalloprotein is a generic term for a protein that contains a metal ion cofactor.
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Metatrochophore
A metatrochophore is a type of larva developed from the trochophore larva of a polychaete annelid.
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Mexican tetra
The Mexican tetra or blind cave fish (Astyanax mexicanus) is a freshwater fish of the family Characidae of the order Characiformes.
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Microchaetus rappi
Microchaetus rappi, the African giant earthworm, is a large earthworm in the Microchaetidae family, the largest of the segmented worms (commonly called earthworms).
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Mir-7 microRNA precursor
This family represents the microRNA (miRNA) precursor mir-7.
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MirGeneDB
MirGeneDB is a database of microRNA genes that have been validated and annotated as described in Fromm et al.
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Mollusca
Mollusca is a large phylum of invertebrate animals whose members are known as molluscs or mollusksThe formerly dominant spelling mollusk is still used in the U.S. — see the reasons given in Gary Rosenberg's.
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Moniligastridae
Moniligastridae is a family of earthworms native to South and Eastern Asia, containing around 200 species and five genera.
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Motobdella
Motobdella is a genus of leeches in the family Erpobdellidae.
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Motobdella montezuma
Motobdella montezuma is a species of leech which is only found in Montezuma Well, central Arizona, United States.
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Muscle contraction
Muscle contraction is the activation of tension-generating sites within muscle fibers.
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Museum of Zoology of the University of São Paulo
The Museum of Zoology of the University of São Paulo (Museu de Zoologia da Universidade de São Paulo, abbreviated MZUSP) is a public natural history museum located in the historic Ipiranga district of São Paulo, Brazil.
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Mushroom bodies
The mushroom bodies or corpora pedunculata are a pair of structures in the brain of insects, other arthropods, and some annelids (notably the ragworm).
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Myosin
Myosins are a superfamily of motor proteins best known for their roles in muscle contraction and in a wide range of other motility processes in eukaryotes.
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Myristica swamp
Myristica swamps are a type of freshwater swamp forest predominantly composed of species of Myristica.
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Myxicola infundibulum
Myxicola infundibulum is a species of polychaete worm from the family Sabellidae.
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Myxobolidae
Myxobolidae is a family of myxosporean parasites which typically infect freshwater fishes, and includes the economically significant species, Myxobolus cerebralis.
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Myxobolus cerebralis
Myxobolus cerebralis is a myxosporean parasite of salmonids (salmon, trout, and their allies) that causes whirling disease in farmed salmon and trout and also in wild fish populations.
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Myxosporea
Myxosporea is a subclass of microscopic parasites, belonging to the Myxozoa clade within Cnidaria.
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Myxozoa
Myxozoa (etymology: Greek: μύξα myxa "slime" or "mucus" + thematic vowel o + ζῷον zoon "animals") is a class of aquatic, obligately parasitic cnidarian animals.
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Myzostoma
Myzostoma is a genus of marine worms, which are which are parasitic on crinoids in the family Myzostomidae.
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Myzostoma fuscomaculatum
Myzostoma fuscomaculatum, the crinoid worm, is a species of marine worm in the family Myzostomida.
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Myzostomida
The Myzostomida are an order of small marine polychaete worms, which are parasitic on crinoids.
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Naididae
The Naididae (formerly known as Tubificidae) are a family of clitellate oligochaete worms like the sludge worm, Tubifex tubifex.
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Namalycastis jaya
Namalycastis jaya Mathan Magesh, Kvist & Glasby, 2012 is a species of brackish-water polychaete worm in the family Nereididae known from the southern coast of Kerala in southwest India.
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Natural farming
Natural farming is an ecological farming approach established by Masanobu Fukuoka (1913–2008), a Japanese farmer and philosopher, introduced in his 1975 book The One-Straw Revolution.
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Natural History Museum of Los Angeles County
The Natural History Museum of Los Angeles County is the largest natural and historical museum in the western United States.
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Natural history of Rhodes
The natural history of the island of Rhodes is determined by its geographic position, climate and geological diversity.
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Nectocaris
Nectocaris pteryx is a species of possible cephalopod affinity, known from the "early Cambrian" (Series 2) Emu Bay Shale and Chengjiang biota, and the "middle Cambrian" (Series 3, Stage 5) Burgess Shale.
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Nemertea
Nemertea is a phylum of invertebrate animals also known as "ribbon worms" or "proboscis worms".
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Neosabellaria cementarium
Neosabellaria cementarium is a species of marine tube worm in the family Sabellariidae, perhaps better known by its previous name, Sabellaria cementarium.
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Nephridiopore
A nephridiopore is part of the nephridium, an excretory organ found in many organisms, such as flatworms and annelids.
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Nephridium
The nephridium (plural nephridia) is an invertebrate organ which occurs in pairs and performs a function similar to the vertebrate kidney.
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Nephrozoa
Nephrozoa is a major clade of bilaterians, divided into the protostomes and the deuterostomes, containing almost all animal phyla and over a million extant species.
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Nephtyidae
Nephtyidae is a taxonomic family of polychaete worms.
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Nephtys
Nephtys is a genus of marine catworms.
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Nereididae
Nereididae (formerly spelled Nereidae) are a family of polychaete worms.
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Nereis
Nereis is a genus of polychaete worms in the family Nereididae.
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Nereis onychophora
Nereis onychophora is a polychaete worm of the phylum Annelida.
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Nereis vexillosa
Nereis vexillosa belongs to the phylum Annelida, a group known as the segmented worms.
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Nerilla antennata
Nerilla antennata is 1–2 mm coulorless meiofaunal polychaete.
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Nerillida
Nerillida is an order of annelid worms in the class Polychaeta.
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Nerillidae
The Nerillidae are a family of invertebrates containing these genera.
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Nescopeck Creek
Nescopeck Creek is a U.S. Geological Survey.
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Nicolaus Kleinenberg
Nicolaus Kleinenberg (11 March 1842, in Libau – 5 November 1897, in Naples) was a Baltic German zoologist and evolutionary morphologist.
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Niobrara Formation
The Niobrara Formation, also called the Niobrara Chalk, is a geologic formation in North America that was deposited between 87 and 82 million years ago during the Coniacian, Santonian, and Campanian stages of the Late Cretaceous.
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No-till farming
No-till farming (also called zero tillage or direct drilling) is a way of growing crops or pasture from year to year without disturbing the soil through tillage.
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Norealidys
Norealidys is a replacement name for preoccupied earthworm genus Reynoldsia - non Reynoldsia (Diptera: Muscidae) - under ICZN (1999) as previously flagged.
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Northeast Ecological Corridor
The Northeast Ecological Corridor Nature Reserve (NECNR) refers to an area designated as a protected Nature Reserve located on the northeast coast of Puerto Rico, between the municipalities of Luquillo and Fajardo.
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Nuchal organ
The nuchal organ is a ciliated pit or groove present at the posterior end of the prostomium of annelid worms, some cephalopods, and other invertebrates.
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Odontogriphus
Odontogriphus (literally "toothed riddle") is a genus of soft-bodied animals known from middle Cambrian Lagerstätte.
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Odontosyllis enopla
Odontosyllis enopla, commonly known as the Bermuda fireworm, is a polychaete worm that inhabits shallow areas of the western Atlantic Ocean.
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Odontosyllis phosphorea
Odontosyllis phosphorea, commonly known as a fireworm, is a polychaete worm that inhabits the Pacific coast of North and Central America.
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Olavius algarvensis
Olavius algarvensis is a species of gutless oligochaete worm in the family Tubificidae which depends on symbiotic bacteria for its nutrition.
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Olavius finitimus
Olavius finitimus is a species of clitellate oligochaete worm, first found in Belize, on the Caribbean side of Central America.
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Olavius pravus
Olavius pravus is a species of clitellate oligochaete worm, first found in Belize, on the Caribbean side of Central America.
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Olavius vacuus
Olavius vacuus is a species of clitellate oligochaete worm, first found in Belize, on the Caribbean side of Central America.
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Olev Vinn
Olev Vinn (January 26, 1971) is Estonian paleobiologist and paleontologist.
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Oligochaeta
Oligochaeta is a subclass of animals in the phylum Annelida, which is made up of many types of aquatic and terrestrial worms, including all of the various earthworms.
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Onuphidae
The Onuphidae are a family of polychaete worms.
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Onychophora
Onychophora (from Ancient Greek, onyches, "claws"; and pherein, "to carry"), commonly known as velvet worms (due to their velvety texture and somewhat wormlike appearance) or more ambiguously as peripatus (after the first described genus, Peripatus), is a phylum of elongate, soft-bodied, many-legged panarthropods.
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Opabinia
Opabinia regalis is an extinct, stem group arthropod found in the Middle Cambrian Burgess Shale Lagerstätte of British Columbia, Canada.
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Opheliidae
Ophelliidae is a family of small, annelid worms.
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Ophelina acuminata
Ophelina acuminata is a species of marine annelids, found in the sublittoral mud and sand bottom.
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Ophryotrocha
Ophryotrocha is a genus of marine polychaete worms in the family Dorvilleidae.
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Ophryotrocha batillus
Ophryotrocha batillus is a species of polychaete worm, first found on deep sea whale fall and wood fall habitats in the north-east Pacific, off the southern Californian coast.
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Ophryotrocha craigsmithi
Ophryotrocha craigsmithi is a species of polychaete worm.
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Ophryotrocha eutrophila
Ophryotrocha eutrophila, is a species of polychaete worm.
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Ophryotrocha flabella
Ophryotrocha flabella is a species of polychaete worm, first found on deep sea whale fall and wood fall habitats in the north-east Pacific, off the southern Californian coast.
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Ophryotrocha langstrumpae
Ophryotrocha langstrumpae is a species of polychaete worm, first found on deep sea whale fall and wood fall habitats in the north-east Pacific, off the southern Californian coast.
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Ophryotrocha longicollaris
Ophryotrocha longicollaris is a species of polychaete worm, first found on deep sea whale fall and wood fall habitats in the north-east Pacific, off the southern Californian coast.
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Ophryotrocha magnadentata
Ophryotrocha magnadentata is a species of polychaete worm, first found on deep sea whale fall and wood fall habitats in the north-east Pacific, off the southern Californian coast.
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Ophryotrocha nauarchus
Ophryotrocha nauarchus is a species of polychaete worm, first found on deep sea whale fall and wood fall habitats in the north-east Pacific, off the southern Californian coast.
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Ophryotrocha puerilis
Ophryotrocha puerilis is a species of marine polychaete worms in the order Eunicida.
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Ophryotrocha scutellus
Ophryotrocha scutellus, is a species of polychaete worm.
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OPN5
Neuropsin is a protein that in humans is encoded by the OPN5 gene.
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Orbiniidae
Orbiniidae is a family of polychaete worms.
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Organisms involved in water purification
Most organisms involved in water purification originate from the waste, wastewater or water stream itself or arrive as resting spore of some form from the atmosphere.
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Orobdella masaakikuroiwai
Orobdella masaakikuroiwai is a species of proboscisless leech from Japan.
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Orthrozanclus
Orthrozanclus reburrus ("Dawn scythe with bristling hair") is a sea creature known from the Middle Cambrian (~) Burgess shale, about one centimeter long, with long spikes protruding from its armored body The describers of this fossil animal, Simon Conway Morris and Jean-Bernard Caron, say Orthrozanclus may have formed a link between the halkieriid and the wiwaxiid families, uniting them tentatively in a group called "Halwaxiida", characterized by a similar type of body armor; these organisms might have been stem group molluscs, or fall as a stem group to the larger lophotrochozoan clade (containing molluscs, annelids and brachiopods).
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Osedax
Osedax is a genus of deep-sea siboglinid polychaetes, commonly called boneworms, zombie worms, or bone-eating worms.
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Osedax frankpressi
Osedax frankpressi is a species of bathypelagic polychaete worm that lives on the seabed and sustains itself on the bones of dead whales.
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Osedax japonicus
Osedax japonicus is a species of bathypelagic polychaete tube worm that lives at great depths on the seabed and is able to sustain itself on the bones of a dead whale.
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Osedax mucofloris
Osedax mucofloris is a species of bathypelagic Polychaetes that is reported to sustain itself on the bones of dead whales.
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Osedax priapus
Osedax priapus is a species of bathypelagic Polychaetes that is reported to sustain itself on the bones of dead whales.
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Osedax roseus
Osedax roseus is a species of bathypelagic polychaete worm that lives at abyssal depths and is able to sustain itself on the bones of dead whales.
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Osedax rubiplumus
Osedax rubiplumus is a species of bathypelagic Polychaetes that is reported to sustain itself on the bones of dead whales.
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Outline of biology
Biology – The natural science that involves the study of life and living organisms, including their structure, function, growth, origin, evolution, distribution, and taxonomy.
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Outline of life forms
The following outline is provided as an overview of and topical guide to life forms: Life form (also, lifeform) – entity that is living, such as plants (flora) and animals (fauna).
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Outline of zoology
The following outline is provided as an overview of and topical guide to zoology: Zoology – study of animals.
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Owenia (worm)
Owenia is a genus of marine polychaete worms in the family Oweniidae.
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Oweniidae
Oweniidae is a family of marine polychaete worms in the suborder Sabellida.
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Oystercatcher
The oystercatchers are a group of waders forming the family Haematopodidae, which has a single genus, Haematopus.
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Ozobranchus branchiatus
Ozobranchus branchiatus is a species of leech in the family Ozobranchidae.
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Pain in animals
In humans, pain is a distressing feeling often caused by intense or damaging stimuli.
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Pain in invertebrates
Pain in invertebrates is a contentious issue.
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Painted-snipe
The Rostratulidae (commonly known as painted-snipes), form a taxonomic family of wader species, composed of two genera: Rostratula and Nycticryphes.
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Paleobiota of the Niobrara Formation
During the time of the deposition of the Niobrara Chalk, much life inhabited the seas of the Western Interior Seaway.
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Paleontology
Paleontology or palaeontology is the scientific study of life that existed prior to, and sometimes including, the start of the Holocene Epoch (roughly 11,700 years before present).
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Paleontology in Delaware
The location of the state of Delaware Paleontology in Delaware refers to paleontological research occurring within or conducted by people from the U.S. state of Delaware.
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Palola viridis
Palola viridis, commonly known as the palolo worm or Samoan palolo worm, is a Polychaeta species from the waters of the Pacific islands around Samoa and the Maluku Islands.
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Palynology
Palynology is the "study of dust" (from palunō, "strew, sprinkle" and -logy) or "particles that are strewn".
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Panarthropoda
Panarthropoda is a proposed animal clade combining the extant phyla Arthropoda, Tardigrada and Onychophora, Not all studies support it, but most do, including neuroanatomical, mitogenomic and palaeontological studies.
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Parafabricia mazzellae
Parafabricia mazzellae is a species of annelid worm in the class Polychaeta, which particularly lives in slightly acidified coastal systems in the Mediterranean Sea.
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Paralvinella sulfincola
Paralvinella sulfincola is a species of polychaete worm of the Alvinellidae family that thrives on undersea hot-water vents.
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Parambassis ranga
Parambassis ranga, commonly known as the Indian glassy fish, Indian glassy perch or Indian X-ray fish, is a species of freshwater fish in the Asiatic glassfish family Ambassidae of order Perciformes.
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Parapionosyllis
Parapionosyllis is a genus of polychaete annelids.
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Parapionosyllis elegans
Parapionosyllis elegans is a species of polychaete annelids.
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Parapionosyllis winnunga
Parapionosyllis winnunga is a species belonging to the phylum Annelida, a group known as the segmented worms.
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Parapodium
The term parapodium (Gr. para, beyond or beside + podia, feet) refers to two different organs.
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Parasitic castration
Parasitic castration is the strategy, by a parasite, of blocking reproduction by its host, completely or in part, to its own benefit.
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Parasitism
In evolutionary biology, parasitism is a relationship between species, where one organism, the parasite, lives on or in another organism, the host, causing it some harm, and is adapted structurally to this way of life.
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Pectinaria (annelid)
Pectinaria is a genus of sand tube-building annelid fanworms in the family Pectinariidae.
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Pectinaria australis
Pectinaria australis is one of at least ten species of polychaete worms of the family Pectinariidae.
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Pectinariidae
Pectinariidae, or the trumpet worms or ice cream cone worms, are a family of marine polychaete worms that build tubes using grains of sand roughly resembling ice cream cones or trumpets.
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Pentastomida
Pentastomida are an enigmatic group of parasitic crustaceans commonly known as tongue worms due to the resemblance of the species of the genus Linguatula to a vertebrate tongue.
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Perionyx excavatus
Perionyx excavatus is a commercially produced earthworm.
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Periproct
The periproct is the final body segment in annelid worms.
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Peristalsis
Peristalsis is a radially symmetrical contraction and relaxation of muscles that propagates in a wave down a tube, in an anterograde direction.
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Peristomium
The peristomium is the first true body segment in an annelid worm's body in the anterior end.
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Peritoneum
The peritoneum is the serous membrane that forms the lining of the abdominal cavity or coelom in amniotes and some invertebrates, such as annelids.
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Peronochaeta
Peronochaeta is a genus of annelid known from the Middle Cambrian Burgess Shale.
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Petta (polychaete genus)
Petta is a genus in the polychaete family Pectinariidae.
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Phallodrilus
Phallodrilus is a genus of invertebrate in the Tubificidae family.
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Phallodrilus macmasterae
Phallodrilus macmasterae is a species of invertebrate in the Tubificidae family.
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Pharynx
The pharynx (plural: pharynges) is the part of the throat that is behind the mouth and nasal cavity and above the esophagus and the larynx, or the tubes going down to the stomach and the lungs.
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Philobdella floridana
Philobdella floridana is a species of leech that lives in the most southern parts of the United States.
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Phoronid
Phoronids (scientific name Phoronida, sometimes called horseshoe worms) are a small phylum of marine animals that filter-feed with a lophophore (a "crown" of tentacles), and build upright tubes of chitin to support and protect their soft bodies.
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Phosphagen
Phosphagens, also known as macroergic compounds, are energy storage compounds, also known as high-energy phosphate compounds, chiefly found in muscular tissue in animals.
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Phototaxis
Phototaxis is a kind of taxis, or locomotory movement, that occurs when a whole organism moves towards or away from stimulus of light.
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Phragmatopoma californica
Phragmatopoma californica, commonly known as the sandcastle worm, the honeycomb worm or the honeycomb tube worm, is a reef-forming marine polychaete worm belonging to the family Sabellarididae.
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Phumdi
Phumdis are a series of floating islands, exclusive to the Loktak Lake in Manipur state, in northeastern India.
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Phyllodoce (annelid)
Phyllodoce is a genus of polychaete worms, which contains about 200 species.
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Phyllodoce maculata
Phyllodoce maculata is a species of Polychaete worm in the family Phyllodocidae.
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Phyllodoce mucosa
Phyllodoce mucosa is a species of polychaete worm in the family Phyllodocidae.
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Phyllodocida
Phyllodocida is an order of polychaete worms in the subclass Aciculata.
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Phyllodocidae
Phyllodocidae is a family of polychaete worms.
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Phylum
In biology, a phylum (plural: phyla) is a level of classification or taxonomic rank below Kingdom and above Class.
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Phytobdella catenifera
Phytobdella catenifera is a large (5-cm long) terrestrial leech found in Peninsular Malaysia.
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Pilargidae
Pilargidae is a family of polychaetes.
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Pionosyllis serratisetosa
Pionosyllis serratisetosa is a polychaete from the family Syllidae.
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Piscicola geometra
Piscicola geometra is a species of leech in the family Piscicolidae.
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Placobdella parasitica
Placobdella parasitica is a species of leech.
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Planes minutus
Planes minutus is a species of pelagic crab that lives in the North Atlantic Ocean.
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Plankton
Plankton (singular plankter) are the diverse collection of organisms that live in large bodies of water and are unable to swim against a current.
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Platynereis
Platynereis is a genus of marine annelid worms.
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Platynereis dumerilii
Platynereis dumerilii is a species of annelids.
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Platypus
The platypus (Ornithorhynchus anatinus), sometimes referred to as the duck-billed platypus, is a semiaquatic egg-laying mammal endemic to eastern Australia, including Tasmania.
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Plumulites
Plumulites canadensis is a member of the machaeridian family and existed from until about.
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Polychaete
The Polychaeta, also known as the bristle worms or polychaetes, are a paraphyletic class of annelid worms, generally marine.
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Polynoidae
Polynoidae is a family of scaled Polychaete worms known as the "scale worms".
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Polyodontes
Polyodontes is a genus of polychaete worms in the subclass Aciculata.
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Polyodontes maxillosus
Polyodontes maxillosus is a species of polychaete worm in the family Acoetidae.
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Polystrate fossil
A polystrate fossil is a fossil of a single organism (such as a tree trunk) that extends through more than one geological stratum.
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Pomatoceros lamarckii
Pomatoceros lamarckii is a species of tube-building annelid worms which is widespread in intertidal and sub-littoral zones around the United Kingdom and northern Europe.
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Pomatoceros triqueter
Pomatoceros triqueter is a species of tube-building annelid worm in the class Polychaeta.
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Precambrian body plans
Until the late 1950s, the Precambrian era was not believed to have hosted multicellular organisms.
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Proarticulata
Proarticulata is an extinct phylum of very early, superficially bilaterally symmetrical animals known from fossils found in the Ediacaran (Vendian) marine deposits, and dates to approximately.
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Proctolin
Proctolin is a neuropeptide present in insects and crustaceans.
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Prosellodrilus amplisetosus
Prosellodrilus amplisetosus is a species of earthworm native to Aquitaine in south-western France; it has also been introduced to a site in County Louth, Ireland.
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Prosphaerosyllis battiri
Prosphaerosyllis battiri is a species belonging to the phylum Annelida, a group known as the segmented worms.
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Prostomium
The prostomium (sometimes also called the acron) is the first body segment in an annelid worm's body in the anterior end.
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Protococcidiorida
Protococcidiorida is an order within the subclass Conoidasida of the phylum Apicomplexia.
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Protostome
Protostomia (from Greek πρωτο- proto- "first" and στόμα stoma "mouth") is a clade of animals.
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Protula
Protula is a genus of marine polychaete worms in the family Serpulidae.
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Protula bispiralis
Protula bispiralis, commonly known as the red fanworm or as a mopworm, is a species of marine polychaete worm in the family Serpulidae.
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Protulophila
Protulophila is a genus of symbiotic or commensal colonial Hydrozoa, known from very small hydroids.
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Psamathini
Psamathini are a tribe of phyllodocid "bristle worms" (class Polychaeta) in the family Hesionidae.
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Psammodrilus balanoglossoides
Psammodrilus balanoglossoides is a species of meiofaunal polychaete annelid only found in France and the North Sea, it is one of the five species representing the genus Psammorilus.
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Psilaster andromeda
Psilaster andromeda is a species of starfish in the family Astropectinidae.
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Puffadder shyshark
The puffadder shyshark or happy Eddie (Haploblepharus edwardsii) is a species of catshark, belonging to the family Scyliorhinidae, endemic to the temperate waters off the coast of South Africa.
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Purinergic signalling
Purinergic signalling (or signaling: see American and British English differences) is a form of extracellular signalling mediated by purine nucleotides and nucleosides such as adenosine and ATP.
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Pygospio
Pygospio is a genus of marine polychaete worms in the family Spionidae.
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Pygospio elegans
Pygospio elegans is a species of marine polychaete worms in the family Spionidae.
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Pylojacquesidae
The Pylojacquesidae are a small family of hermit crabs, comprising only two species in two genera.
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Queen danio
The queen danio or Fowler's danio (Devario regina) is a freshwater tropical fish belonging to the minnow family (Cyprinidae).
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Radiole
A radiole is a heavily ciliated feather-like tentacle found in highly organized clusters on the crowns of Canalipalpata.
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Rainbow trout
The rainbow trout (Oncorhynchus mykiss) is a trout and species of salmonid native to cold-water tributaries of the Pacific Ocean in Asia and North America.
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Ramisyllis multicaudata
Ramisyllis multicaudata is a species of polychaete worms in the family Syllidae.
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Ramphoprionidae
Ramphoprionidae are a family of polychaete worms known from the Ordovician and Silurian periods (and more?).
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Recurvirostridae
The Recurvirostridae are a family of birds in the wader suborder Charadrii.
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Red stingray
The red stingray (Hemitrygon akajei) is a species of stingray in the family Dasyatidae, found in the northwestern Pacific Ocean off Japan, Korea, and China, and possibly elsewhere.
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Red-kneed dotterel
The red-kneed dotterel (Erythrogonys cinctus) is a species of plover in a monotypic genus in the subfamily Vanellinae.
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Reedfish
The reedfish, ropefish (more commonly used in the United States), or snakefish, Erpetoichthys calabaricus, is a species of freshwater fish in the bichir family and order.
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Regeneration (biology)
In biology, regeneration is the process of renewal, restoration, and growth that makes genomes, cells, organisms, and ecosystems resilient to natural fluctuations or events that cause disturbance or damage.
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René-Édouard Claparède
René-Édouard Claparède (24 April 1832 in Chancy – 31 May 1871 in Siena) was a Swiss anatomist.
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Rhinodrilus
Rhinodrilus is a genus of large South American earthworms.
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Rhinodrilus fafner
Rhinodrilus fafner is a presumed extinct giant earthworm from the family Glossoscolecidae.
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Rhynchelmis
Rhynchelmis is the genus of 30 species of aquatic oligochaetes from the Northern Hemisphere, with 11 species from North America and 19 from Eurasia.
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Rhynchelmis orientalis
Rhynchelmis orientalis is a freshwater worm.
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Rhynchobdellida
Rhynchobdellida, the jawless leeches, although paraphyletic, are classified as an order of the Hirudinea.
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Rhytidocystidae
Rhytidocystidae is a family within the order Agamococcidiorida of the phylum Apicomplexa.
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Richard Greeff
Richard Greeff (14 March 1829, Elberfeld – 30 August 1892, Marburg) was a German zoologist.
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Richard L. Hoffman
Richard Lawrence Hoffman (September 25, 1927 – June 10, 2012) was an American zoologist known as an international expert on millipedes, and a leading authority on the natural history of Virginia and the Appalachian Mountains.
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Riftia pachyptila
Riftia pachyptila, commonly known as giant tube worms, are marine invertebrates in the phylum Annelida (formerly grouped in phylum Pogonophora and Vestimentifera) related to tube worms commonly found in the intertidal and pelagic zones.
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Rotularia
Rotularia is an extinct genus of planispirally coiled fossil polychaete worms in the family Serpulidae.
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Roughtail stingray
The roughtail stingray (Dasyatis centroura) is a species of stingray in the family Dasyatidae, with separate populations in coastal waters of the northwestern, eastern, and southwestern Atlantic Ocean.
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Sabella (genus)
Sabella is a genus of marine polychaete worm.
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Sabella pavonina
Sabella pavonina, commonly known as the peacock worm, is a marine polychaete worm belonging to the family Sabellidae.
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Sabella spallanzanii
Sabella spallanzanii is a species of marine polychaete worms in the family Sabellidae.
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Sabellaria
Sabellaria is a genus of marine polychaete worms in the family Sabellariidae.
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Sabellaria alveolata
Sabellaria alveolata, (also known as the honeycomb worm), is a reef-forming polychaete.
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Sabellaria spinulosa
Sabellaria spinulosa is a species of marine polychaete worm in the family Sabellariidae, commonly known as the Ross worm.
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Sabellariidae
Sabellariidae is a family of marine polychaete worms in the suborder Sabellida.
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Sabellastarte
Sabellastarte is a genus of marine polychaete worms in the family Sabellidae.
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Sabellastarte longa
Sabellastarte longa is a species of marine polychaete worms in the family Sabellidae.
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Sabellastarte spectabilis
Sabellastarte spectabilis is a species of benthic marine polychaete worm in the Sabellidae family.
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Sabellida
Sabellida is a suborder of annelid worms in the class Polychaeta.
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Sabellidae
Sabellidae (feather duster worms) are a family of sedentary marine polychaete tube worms in which the head is mostly concealed by feathery branchiae.
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Sabellidites
Sabellidites cambriensis is a species of annelid from the Ediacaran period.
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Saccocirridae
The Saccocirridae are small interstitial polychaetes common in coarse sand on reflective, surf beaches, usually within the zone of retention.
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Salmacina
Salmacina is a genus of marine polychaete worms in the family Sabellidae.
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Salmacina dysteri
Salmacina dysteri is a species of tube-forming annelid worm in the family Serpulidae.
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Salvatoria koorineclavata
Salvatoria koorineclavata is a species belonging to the phylum Annelida, a group known as the segmented worms.
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Salvatoria pilkena
Salvatoria pilkena is a species belonging to the phylum Annelida, a group known as the segmented worms.
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Samuel Wooster James
Samuel James is an American scientist, a researcher specializing in evolutionary biology, focusing on earthworm taxonomy.
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Sanajeh
Sanajeh (meaning "ancient gape" in Sanskrit) is a genus of late Cretaceous madtsoiid snake from western India.
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Sandworm (Dune)
A sandworm is a fictional creature that appears in the ''Dune'' novels written by Frank Herbert.
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Santa Marta Formation
The Santa Marta Formation is a geologic formation in Antarctica.
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Scalibregma inflatum
Scalibregma inflatum, also known as T headed worm, is a burrowing marine polychaete.
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Schizobranchia
Schizobranchia insignis is a genus of marine feather duster worm.
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Schizobranchia insignis
Schizobranchia insignis is a marine feather duster worm.
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Schizocoely
Schizocoely (adjective forms: schizocoelous or schizocoelic) is a process by which some animal embryos develop.
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Schizogregarinina
Schizogregarinina is a superfamily in the phylum Apicomplexia.
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Schmutzdecke
Schmutzdecke (German, “dirt cover” or dirty skin, sometimes wrongly spelled schmutzedecke) is a hypogeal biological layer formed on the surface of a slow sand filter.
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Sclerite
A sclerite (Greek σκληρός, sklēros, meaning "hard") is a hardened body part.
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Scolecida
Scolecida is an infraclass of polychaete worms.
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Scolecodont
A scolecodont is the jaw of a polychaete annelid, a common type of fossil-producing segmented worm useful in invertebrate paleontology.
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Scolelepis squamata
Scolelepis squamata is a species of polychaete worm in the family Spionidae.
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Sea turtle
Sea turtles (superfamily Chelonioidea), sometimes called marine turtles, are reptiles of the order Testudines.
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Sea urchin
Sea urchins or urchins are typically spiny, globular animals, echinoderms in the class Echinoidea.
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Sea worm
Sea worm may refer to one or several of the following phyla.
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Seamount
A seamount is a mountain rising from the ocean seafloor that does not reach to the water's surface (sea level), and thus is not an island, islet or cliff-rock.
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Seashell
A seashell or sea shell, also known simply as a shell, is a hard, protective outer layer created by an animal that lives in the sea.
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Segmentation (biology)
Segmentation in biology is the division of some animal and plant body plans into a series of repetitive segments.
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Sekwitubulus
Sekwitubulus annulatus is an Ediacaran tubular fossil from the Blueflower Formation in Canada.
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Semiaquatic
Semiaquatic can refer to various types of animals that spend part of their time in water, or plants that naturally grow partially submerged in water.
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Septum
In biology, a septum (Latin for something that encloses; plural septa) is a wall, dividing a cavity or structure into smaller ones.
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Serpula
Serpula (also known as calcareous tubeworm, serpulid tubeworm, fanworm, or plume worm) is a genus of sessile, marine annelid tube worms that belongs to the family Serpulidae.
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Serpula vermicularis
Serpula vermicularis, known by common names including the calcareous tubeworm, fan worm, plume worm or red tube worm, is a species of segmented marine polychaete worm in the family Serpulidae.
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Serpulidae
The Serpulidae are a family of sessile, tube-building annelid worms in the class Polychaeta.
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Seta
In biology, setae (singular seta; from the Latin word for "bristle") are any of a number of different bristle- or hair-like structures on living organisms.
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Setiu Wetlands
Setiu Wetland (Malay: Tanah Bencah Setiu or Laguna Setiu) is a wetland in Setiu District, Terengganu, Malaysia.
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Sharptail mola
The sharptail mola (Masturus lanceolatus) is a species of mola found circumglobally in tropical and temperate waters.
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Siboglinidae
Siboglinidae, also known as the beard worms, is a family of polychaete annelid worms whose members made up the former phyla Pogonophora (the giant tube worms) and Vestimentifera.
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Sipuncula
The Sipuncula or Sipunculida (common names sipunculid worms or peanut worms) is a group containing 144–320 species (estimates vary) of bilaterally symmetrical, unsegmented marine worms.
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Sirius Passet
Sirius Passet is a Cambrian Lagerstätte in Greenland.
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Skin infection
Infection of the skin is distinguished from dermatitis, Stating: "Excludes:...
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Slow sand filter
Slow sand filters are used in water purification for treating raw water to produce a potable product.
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Small shelly fauna
The small shelly fauna, small shelly fossils (SSF), or early skeletal fossils (ESF) are mineralized fossils, many only a few millimetres long, with a nearly continuous record from the latest stages of the Ediacaran to the end of the Early Cambrian Period.
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Small-scale whiting
The small-scale whiting (Sillago parvisquamis) (also known as the blue whiting), is a species of inshore marine fish of the smelt-whiting family Sillaginidae.
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Smithsonidrilus appositus
Smithsonidrilus appositus is a species of clitellate oligochaete worm, first found in Belize, on the Caribbean side of Central America.
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Smithsonidrilus involutus
Smithsonidrilus involutus is a species of clitellate oligochaete worm, first found in Belize, on the Caribbean side of Central America.
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Smithsonidrilus multiglandularis
Smithsonidrilus multiglandularis is a species of clitellate oligochaete worms, first found in Puerto Rico and Florida.
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Smithsonidrilus pauper
Smithsonidrilus pauper is a species of clitellate oligochaete worm.
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Snares snipe
The Snares Island snipe (Coenocorypha huegeli), also known as the Snares snipe or tutukiwi in Māori, is a species of bird in the sandpiper family, Scolopacidae.
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Soft-bodied organism
Soft-bodied organisms are animals that lack skeletons, a group roughly corresponding to the group Vermes as proposed by Carl von Linné.
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Soil life
This table is a résumé of soil life,, Les Bases de la Production Végetal, tome I: Le Sol et son amélioration,, 2003 coherent with prevalent taxonomy as used in the linked Wikipedia articles.
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Sonatsa
Sonatsa is a genus of marine, mud-dwelling polychaete worms containing the sole species Sonatsa meridionalis.
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South Lodge Pit
South Lodge Pit is a 0.5 hectare geological Site of Special Scientific Interest in Taplow in Buckinghamshire.
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Southern platyfish
The southern platyfish, common platy, or moonfish (Xiphophorus maculatus) is a species of freshwater fish in family Poeciliidae of order Cyprinodontiformes.
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Southern short-tailed shrew
The southern short-tailed shrew (Blarina carolinensis) is a gray, short-tailed shrew that inhabits the eastern United States.
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Sparganophilus
Sparganophilus, the only genus in the family Sparganophilidae, is a group of long, slender, limicolous (mud-dwelling) earthworms native to North America.
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Species first discovered in Hong Kong
This list contains species first discovered in Hong Kong, with the endemic species asterisked.
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Species of The Saga of Seven Suns
The races and Species of The Saga of Seven Suns are the assortment of humans and aliens represented in The Saga of Seven Suns series of science fiction novels written by Kevin J. Anderson and its sequel trilogy The Saga of Shadows.
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Speleonectes atlantida
Speleonectes atlantida is a species of eyeless crustacean in the order Nectiopoda.
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Spenceriella
Spenceriella is a genus of worms in the family Megascolecidae that is now included in the prior genus Anisochaeta although some other species are transferred to Celeriella.
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Spenceriella gigantea
Spenceriella gigantea, or the North Auckland worm, is a rare giant annelid of the family Megascolecidae, endemic to New Zealand.
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Sphaerosyllis bardukaciculata
Sphaerosyllis bardukaciculata is a species belonging to the phylum Annelida, a group known as the segmented worms.
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Sphaerosyllis georgeharrisoni
Sphaerosyllis georgeharrisoni is a species belonging to the phylum Annelida, a group known as the segmented worms.
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Sphaerosyllis goorabantennata
Sphaerosyllis goorabantennata is a species belonging to the phylum Annelida, a group known as the segmented worms.
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Sphaerosyllis levantina
Sphaerosyllis levantina is a species belonging to the phylum Annelida, a group known as the segmented worms.
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Sphaerosyllis voluntariorum
Sphaerosyllis voluntariorum is a species belonging to the phylum Annelida, a group known as the segmented worms.
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Spinther
Spintheridae is a family of marine polychaete worms with a single genus, Spinther, containing these species.
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Spiralia
The Spiralia are a morphologically diverse clade of protostome animals, including within their number the molluscs, annelids, platyhelminths and other taxa.
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Spirobranchus
Spirobranchus is a small genus of tube-building annelid fanworms in the family Serpulidae.
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Spirobranchus giganteus
Spirobranchus giganteus, commonly known as Christmas tree worms, are tube-building polychaete worms belonging to the family Serpulidae.
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Spirobranchus kraussii
The Blue coral-worm (Spirobranchus kraussii) is a species of marine invertebrate in the family Serpulidae of order Sabellida.
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Spirorbis
Spirorbis is a genus of very small polychaete worms, usually with a white coiled shell.
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Spirorbis borealis
Spirorbis borealis is a sedentary marine polychaete worm in the Serpulidae family.
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Spirorbis corallinae
Spirorbis corallinae is a very small (1-2 mm) coiled polychaete that lives attached to seaweed in shallow saltwater.
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Spirorbis spirorbis
Spirorbis spirorbis is a small (3–4 mm) coiled polychaete that lives attached to seaweeds and eel grass in shallow saltwater.
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Spotted bass
The spotted bass (Micropterus punctulatus), also called spotty, or spots in various fishing communities, is a species of freshwater fish of the sunfish family (Centrarchidae) of the order Perciformes.
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Spriggina
Spriggina is a genus of early bilaterian animals whose relationship to living animals is unclear.
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St Kilda – Chapman Creek Aquatic Reserve
St Kilda – Chapman Creek Aquatic Reserve is a marine protected area in the Australian state of South Australia located in waters on the east coast of Gulf St Vincent adjoining the suburbs of Buckland Park and St Kilda about north of the state capital of Adelaide.
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Stephenoscolex
Stephenoscolex is a genus of polychaete worm known from the Middle Cambrian Burgess Shale.
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Stereotypes of animals
When anthropomorphising an animal there are stereotypical traits which commonly tend to be associated with particular species.
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Structures built by animals
Nature abounds with structures built by animals other than humans, or animal architecture, as it is commonly termed, such as termite mounds, wasp and beehives, burrow complexes of rodents, beaver dams, elaborate nests of birds, and webs of spiders.
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Sturgeon poacher
The sturgeon poacher (Podothecus accipenserinus, also known as the sturgeon-like sea-poacher in Canada) is a fish in the family Agonidae (poachers).
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Sucker (zoology)
A sucker in zoology refers to specialised attachment organ of an animal.
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Sulfurimonas
Sulfurimonas is a bacterial genus within the class of Epsilonproteobacteria, known for reducing nitrate, oxidizing both sulfur and hydrogen, and containing Group IV hydrogenases.
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Sustainable Technology Optimization Research Center
The Sustainable Technology Optimization Research Center (STORC) is a research facility located on the California State University Sacramento campus.
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Swima
Swima is a genus of polychaete worm that lives in the deep ocean.
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Swima bombiviridis
Swima bombiviridis is a worm species that lives in the deep ocean.
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Symmetry in biology
Symmetry in biology is the balanced distribution of duplicate body parts or shapes within the body of an organism.
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Synodontis
Synodontis is the largest genus of mochokid catfishes.
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Tachypleus gigas
Tachypleus gigas, commonly known as the Indo-Pacific horseshoe crab, Indonesian horseshoe crab, Indian horseshoe crab, or southern horseshoe crab, is one of the four extant (living) species of horseshoe crab.
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Tahora Formation
The Tahora Formation is a Late Cretaceous geologic formation that outcrops in northeastern New Zealand near Gisborne.
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Taxonomy of commonly fossilised invertebrates
Although the phylogenetic classification of non-vertebrate animals (both extinct and extant) remains a work-in-progress, the following taxonomy attempts to be useful by combining both traditional (old) and new (21st-century) paleozoological terminology.
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Taxonomy of invertebrates (Brusca & Brusca, 2003)
The taxonomy of invertebrates as proposed by Richard C. Brusca and Gary J. Brusca in 2003 is a system of classification with emphasis on the invertebrates, in other words, a way to classify animals, primarily those which have no backbone.
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Taxonomy of the animals (Hutchins et al., 2003)
The taxonomy of the animals presented by Hutchins et al. in 2003 in Grzimek's Animal Life Encyclopedia is a system of classification which covers all the metazoans, from phyla to orders (or families, for Hexapoda and Pisces, or species, for Amphibia, Reptilia, Aves and Mammalia).
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Tayrona National Natural Park
The Tayrona National Natural Park (Parque Nacional Natural Tayrona) is a protected area in the Colombian northern Caribbean region and within the jurisdiction of the Department of Magdalena and from the city of Santa Marta.
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Teloblast
A teloblast is a large cell in the embryos of clitellate annelids which asymmetrically divide to form many smaller cells known as blast cells.
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Terebellida
Terebellida make up an order of the Polychaeta class, commonly referred to as "bristle worms".
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Terebellidae
The Terebellidae is a marine family of Polychaete worms, of which the type taxon is Terebella, described by Linnaeus in 1767.
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Terebellides
Terebellides is a genus of polychaete worms in the family Terebellidae.
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Terebellides stroemii
Terebellides stroemii is a species of polychaete worms in the family Terebellidae.
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Terebellomorpha
Terebellomorpha is a suborder within the polychaete order Terebellida.
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Terrestrial animal
Terrestrial animals are animals that live predominantly or entirely on land (e.g., cats, ants, spiders), as compared with aquatic animals, which live predominantly or entirely in the water (e.g., fish, lobsters, octopuses), or amphibians, which rely on a combination of aquatic and terrestrial habitats (e.g., frogs, or newts).
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Teuthidodrilus
Teuthidodrilus samae, also known as the squidworm, belongs to the phylum Annelida (ringed worms) and in the detritivorous worm family Acrocirridae.
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Tevnia jerichonana
Tevnia jerichonana is a species of giant tube worm in the family Siboglinidae, living in a unique deep-sea environment.
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Thalassema antarcticum
Thalassema antarcticum is a species of marine echiuran worm.
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Thalassodrilides bruneti
Thalassodrilides bruneti is a species of clitellate oligochaete worm, first found in Belize, on the Caribbean side of Central America.
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The Ancestor's Tale
The Ancestor's Tale: A Pilgrimage to the Dawn of Life is a 2004 popular science book by Richard Dawkins, with contributions from Dawkins' research assistant Yan Wong.
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The Formation of Vegetable Mould through the Action of Worms
The Formation of Vegetable Mould through the Action of Worms, with Observations on their Habits (sometimes shortened to Worms) is an 1881 book by Charles Darwin on earthworms.
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The Zoological Record
The Zoological Record (ZR) is a print and electronic index of zoological literature that also serves as the unofficial register of scientific names in zoology.
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Thelepus cincinnatus
Thelepus cincinnatus is a species of polychaete annelids in the family Terebellidae (spaghetti worms), which can be found inhabiting a tube of secrete on rocks and shells.
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Theodore Holmes Bullock
Theodore Holmes Bullock (16 May 1915 – 20 December 2005) is one of the founding fathers of neuroethology.
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Theromyzon tessulatum
Theromyzon tessulatum is a species of leech in the family Glossiphoniidae.
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Tlayúa Formation
The Tlayúa Formation is an Early Cretaceous (late Albian) geological formation near Tepexi de Rodríguez, Puebla.
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Tomopteris
Tomopteris (Neo-Latin from Greek meaning "a cut" + "wing" but taken to mean "fin") is a genus of marine planktonic polychaetes.
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Trace fossil
A trace fossil, also ichnofossil (ιχνος ikhnos "trace, track"), is a geological record of biological activity.
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Traité de Zoologie
The Traité de zoologie des éditions Masson, complete title Traité de zoologie, anatomie, systématique, biologie popularly known as le Grassé is a 52 volume synthesis of Zoology published between 1948 and 1979 originally under the direction of Pierre-Paul Grassé.
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Trichobranchidae
Trichobranchidae is a family of annelids in the order Terebellida.
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Trickling filter
A trickling filter is a type of wastewater treatment system first used by Dibden and Clowes It consists of a fixed bed of rocks, lava, coke, gravel, slag, polyurethane foam, sphagnum peat moss, ceramic, or plastic media over which sewage or other wastewater flows downward and causes a layer of microbial slime (biofilm) to grow, covering the bed of media.
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Triturus
Triturus is a genus of newts comprising the crested and the marbled newts, which are found from Great Britain through most of continental Europe to westernmost Siberia, Anatolia, and the Caspian Sea region.
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Trochophore
A trochophore (also spelled trocophore) is a type of free-swimming planktonic marine larva with several bands of cilia.
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Trochozoa
The Trochozoa are a proposed basal Lophotrochozoa clade as sister of the Polyzoa.
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Tryblidiida
Tryblidiida is a taxon of monoplacophoran molluscans containing the only extant representatives: 29 species are still alive today, inhabiting the ocean at depths of between.
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Tube worm
A tube worm is any worm-like sessile invertebrate that anchors its tail to an underwater surface and secretes around its body a mineral tube, into which it can withdraw its entire body.
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Tubifex
Tubifex is a cosmopolitan genus of tubificid annelids that inhabits the sediments of lakes, rivers and occasionally sewer lines.
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Tubifex tubifex
Tubifex tubifex, also called the sludge worm, or sewage worm, is a species of tubificid segmented worm that inhabits the sediments of lakes and rivers on several continents.
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Tubificina
Tubificina is a suborder of haplotaxid annelid worms.
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Turbellaria
The Turbellaria are one of the traditional sub-divisions of the phylum Platyhelminthes (flatworms), and include all the sub-groups that are not exclusively parasitic.
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Turtle leech
Turtle leeches are a genus, Ozobranchus, of leeches (Hirudinea) that feed exclusively on the blood of turtles.
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Typhlosole
A typhlosole is an internal fold of the intestine or intestine inner wall.
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Tyrannobdella
Tyrannobdella rex is a species of leech found in South America in the upper reaches of the Amazon. This newly found genus of leech takes sustenance from the mucous membranes of the mammalian upper respiratory tract, and is known to feed upon humans. It has eight teeth. Tyrannobdella rex was discovered feeding upon the mucous membrane of a girl who had recently bathed in the upper Amazon in Peru. Genetic studies show that it is closely related to Dinobdella ferox, a similar species found in Taiwan.
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Ulrich Kutschera
Ulrich Kutschera (born 2 February 1955) is a professor of plant physiology and evolutionary biology who works at the University of Kassel, Germany, and as a Visiting Scientist in Stanford, California, USA.
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Urechis unicinctus
Urechis unicinctus is a species of the marine spoon worm.
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Uttara Kannada
Uttara Kannada (also known as North Canara) is a district in the Indian state of Karnataka.
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Variatus platy
The variatus platy (Xiphophorus variatus), also known as variable platyfish or variegated platy, is a species of freshwater fish in family Poecilidae of order Cyprinodontiformes.
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Ventral nerve cord
The ventral nerve cord (VNC) makes up a part of the central nervous system of some phyla of the bilaterians, particularly within the nematodes, annelids and the arthropods.
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Vermes
Vermes ("worms") is an obsolete taxon used by Carl Linnaeus and Jean-Baptiste Lamarck for non-arthropod invertebrate animals.
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Vermetidae
The Vermetidae, the worm snails or worm shells, are a taxonomic family of small to medium-sized sea snails, marine gastropod molluscs in the clade Littorinimorpha.
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Vermiform
Vermiform describes something shaped like a worm.
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Vermivore
Vermivore (from Latin vermi, meaning "worm" and vorare, "to devour") is a zoological term for animals that eat worms (including annelids, nematodes, and other worm-like animals).
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Vibrio diabolicus
Vibrio diabolicus is a polysaccharide-secreting bacterium isolated from a deep-sea hydrothermal vent polychaete annelid, Alvinella pompejana.
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Vitellogenesis
Vitellogenesis (also known as yolk deposition) is the process of yolk formation via nutrients being deposited in the oocyte, or female germ cell involved in reproduction of lecithotrophic organisms.
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Viviparus georgianus
Viviparus georgianus, common name the banded mystery snail, is a species of large freshwater snail with gills and an operculum, an aquatic gastropod mollusk in the family Viviparidae, the river snails.
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Wels catfish
The wels catfish (or; Silurus glanis), also called sheatfish, is a large species of catfish native to wide areas of central, southern, and eastern Europe, in the basins of the Baltic, Black, and Caspian Seas.
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West Coyote Hills
The West Coyote Hills are a low mountain range in northern Orange County, California.
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Wheeler Shale
The Wheeler Shale (named by Charles Walcott) is a Cambrian (''c.'' 507 Ma) fossil locality world famous for prolific agnostid and Elrathia kingii trilobite remains (even though many areas are barren of fossils) and represents a Konzentrat-Lagerstätten.
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White-rumped sandpiper
The white-rumped sandpiper (Calidris fuscicollis) is a small shorebird that breeds in the northern tundra of Canada and Alaska.
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Wildlife of the Gambia
Wildlife of the Gambia is dictated by several habitat zones over its total land area of about 10,000 km2.
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Wildlife of Ukraine
Wildlife of Ukraine includes its diverse fauna and flora.
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William Aitcheson Haswell
William Aitcheson Haswell (5 August 1854 – 24 January 1925) was a Scottish-Australian zoologist specialising in crustaceans, winner of the 1915 Clarke Medal.
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Wiwaxia
Wiwaxia is a genus of soft-bodied animals that were covered in carbonaceous scales and spines.
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Worm
Worms are many different distantly related animals that typically have a long cylindrical tube-like body and no limbs.
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Xenoma
A xenoma (also known as a 'xenoparasitic complex') is a growth caused by various protists and fungi, most notably microsporidia.
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Xenoturbella bocki
Xenoturbella bocki is a marine benthic worm-like species from the genus Xenoturbella.
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Xerobdellidae
Xerobdellidae are a small family of "jawed leeches".
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Yamaguchia toyensis
Yamaguchia toyensis is one of many aquatic oligochaetes belonging to the family Lumbriculidae discovered on the island of Hokkaidō, Japan, which seems to be one of three "hotspots" of lumbriculid diversity (the others being the Rocky Mountains and Lake Baikal).
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Yellow-billed loon
The yellow-billed loon (Gavia adamsii), also known as the white-billed diver, is the largest member of the loon or diver family.
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Yellowbelly flounder
The yellowbelly flounder (Rhombosolea leporina) is a flatfish of the genus Rhombosolea, found around New Zealand.
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Yelovichnus
Yelovichnus is an "enigmatic" genus known from fossils of the Ediacaran period.
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Zooplankton
Zooplankton are heterotrophic (sometimes detritivorous) plankton.
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2014 in paleontology
No description.
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2015 in paleontology
No description.
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2016 in paleontology
No description.
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2018 in paleontology
No description.
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Redirects here:
Annelid worm, Annelid worms, Annelida, Annelida Phylum, Annelids, Chaetopoda, Phylum Annelida, Phylum annelida, Ringed worm, Segmented worm.
References
[1] https://en.wikipedia.org/wiki/Annelid
