179 relations: Abalone, Abyssal zone, Achatina achatina, Aestivation, Aldanella, Ammonia, Ammonoidea, Anatomy, Ancient Greek, Apex (mollusc), Auricle (anatomy), Bellerophon (genus), Bird, Bivalvia, Caenogastropoda, Calcium carbonate, Cambrian, Camouflage, Carboniferous, Carnivore, Cenozoic, Central nervous system, Cephalopod, Cerata, Charles Darwin, Chippewaella, Chromosomal inversion, Chromosomal translocation, Clade, Cladistics, Cladogram, Class (biology), Coal measures, Cocculinoidea, Common periwinkle, Conch, Conchiolin, Conus, Convergent evolution, Cornu aspersum, Cowry, Cretaceous, Ctenidium (mollusc), Daudebardia, David R. Lindberg, Detritus, Diverticulum (mollusc), DNA, Estuary, Eulimidae, ..., Euopisthobranchia, Extinct in the wild, Extinction, Family (biology), Fertilisation, Foot, Fossil, Freshwater snail, Furongian, Ganglion, Gastropod shell, Georges Cuvier, Ghost slug, Gill, Gonad, Great tit, Greek language, Habitat, Head, Helcionella, Helicidae, Helix (gastropod), Helix pomatia, Hemocyanin, Hemoglobin, Hemolymph, Herbivore, Hermaphrodite, Heterobranchia, Hibernation, Hydrothermal vent, Hypobranchial gland, Insect, Intertidal zone, Invertebrate, Jurassic, Land snail, Larva, Limestone, Limpet, Living fossil, Love dart, Lower Heterobranchia, Lung, Malacologia, Mantle (mollusc), Mating, Mating of gastropods, Mechanoreceptor, Mesozoic, Mitochondrial DNA, Mitochondrion, Mollusca, Monophyly, Mudflat, Mutation, Neomphaloidea, Neontology, Nephridium, Neritimorpha, Nudibranch, Nudipleura, Olfaction, Operculum (gastropod), Opisthobranchia, Ordovician, Osphradium, Paleozoic, Panpulmonata, Paraphyly, Parasitism, Patellogastropoda, Peripheral nervous system, Phenetics, Phylogenetic tree, Phylum, Planorbidae, Pleistocene, Poland, Poleumita, Predation, Prosobranchia, Protein primary structure, Protoconch, Pulmonata, Purbeck Marble, Radula, Reproductive system of gastropods, Rhinophore, Scavenger, Scenella, Sea snail, Seashell, Seaweed, Sense, Sexual selection, Silurian, Simple eye in invertebrates, Siphon (mollusc), Siphonal canal, Slug, Snail, Social learning (social pedagogy), Species, Sphincterochila boissieri, Statocyst, Stomach, Strepsodiscus, Sussex Marble, Systellommatophora, Taxonomy (biology), Taxonomy of the Gastropoda (Bouchet & Rocroi, 2005), Tentacle, Testacella, Torsion (gastropod), Trace fossil, Transfer RNA, Transposable element, Tree of life, Trochophore, Trochulus hispidus, Uric acid, Valve (mollusc), Veliger, Vetigastropoda, Viviparus, Whelk, Xerocrassa seetzeni, YouTube. Expand index (129 more) » « Shrink index
Abalone (or; via Spanish abulón, from Rumsen aulón) is a common name for any of a group of small to very large sea snails, marine gastropod molluscs in the family Haliotidae.
The abyssal zone or abyssopelagic zone is a layer of the pelagic zone of the ocean.
Achatina achatina, common name the African giant snail, also known as the giant tiger land snail and gigantocochlea, is a species of very large, air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Achatinidae.
Aestivation or æstivation (from aestas, summer, but also spelled estivation in American English) is a state of animal dormancy, similar to hibernation, characterized by inactivity and a lowered metabolic rate, that is entered in response to high temperatures and arid conditions.
Aldanella is an extinct paleozoic mollusc that was assigned to the Gastropod stem group but may also belong to a paraphyletic "Monoplacophora".
Ammonia is a compound of nitrogen and hydrogen with the formula NH3.
Ammonoids are an extinct group of marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda.
Anatomy (Greek anatomē, “dissection”) is the branch of biology concerned with the study of the structure of organisms and their parts.
The Ancient Greek language includes the forms of Greek used in ancient Greece and the ancient world from around the 9th century BC to the 6th century AD.
In anatomy, an apex (adjectival form: apical) is part of the shell of a mollusk.
The auricle or auricula is the visible part of the ear that resides outside the head.
Bellerophon is a genus of extinct paleozoic marine molluscs of uncertain position (Gastropoda or Monoplacophora) in the family Bellerophontidae.
Birds, also known as Aves, are a group of endothermic vertebrates, characterised by feathers, toothless beaked jaws, the laying of hard-shelled eggs, a high metabolic rate, a four-chambered heart, and a strong yet lightweight skeleton.
Bivalvia, in previous centuries referred to as the Lamellibranchiata and Pelecypoda, is a class of marine and freshwater molluscs that have laterally compressed bodies enclosed by a shell consisting of two hinged parts.
Caenogastropoda (from Ancient Greek caeno- meaning "recent") is a taxonomic clade, a large diverse group which are mostly sea snails and other marine gastropod mollusks, but also includes some freshwater snails and some land snails.
Calcium carbonate is a chemical compound with the formula CaCO3.
The Cambrian Period was the first geological period of the Paleozoic Era, and of the Phanerozoic Eon.
Camouflage is the use of any combination of materials, coloration, or illumination for concealment, either by making animals or objects hard to see (crypsis), or by disguising them as something else (mimesis).
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.
A carnivore, meaning "meat eater" (Latin, caro, genitive carnis, meaning "meat" or "flesh" and vorare meaning "to devour"), is an organism that derives its energy and nutrient requirements from a diet consisting mainly or exclusively of animal tissue, whether through predation or scavenging.
The Cenozoic Era meaning "new life", is the current and most recent of the three Phanerozoic geological eras, following the Mesozoic Era and, extending from 66 million years ago to the present day.
The central nervous system (CNS) is the part of the nervous system consisting of the brain and spinal cord.
A cephalopod is any member of the molluscan class Cephalopoda (Greek plural κεφαλόποδα, kephalópoda; "head-feet") such as a squid, octopus or nautilus.
Ceras, plural Cerata, are anatomical structures found externally in nudibranch sea slugs, especially in aeolid nudibranchs, marine opisthobranch gastropod mollusks in the clade Aeolidida.
Charles Robert Darwin, (12 February 1809 – 19 April 1882) was an English naturalist, geologist and biologist, best known for his contributions to the science of evolution.
Chippewaella patellitheca is a stem-gastropod mollusc from Furongian-aged strata of Late Cambrian Wisconsin.
An inversion is a chromosome rearrangement in which a segment of a chromosome is reversed end to end.
In genetics, a chromosome translocation is a chromosome abnormality caused by rearrangement of parts between nonhomologous chromosomes.
A clade (from κλάδος, klados, "branch"), also known as monophyletic group, is a group of organisms that consists of a common ancestor and all its lineal descendants, and represents a single "branch" on the "tree of life".
Cladistics (from Greek κλάδος, cládos, i.e., "branch") is an approach to biological classification in which organisms are categorized in groups ("clades") based on the most recent common ancestor.
A cladogram (from Greek clados "branch" and gramma "character") is a diagram used in cladistics to show relations among organisms.
In biological classification, class (classis) is a taxonomic rank, as well as a taxonomic unit, a taxon, in that rank.
The coal measures is a lithostratigraphical term for the coal-bearing part of the Upper Carboniferous System.
The Cocculinoidea is a superfamily of deepwater limpets (marine gastropods), the only superfamily in the clade Cocculiniformia, one of the main clades of gastropods according to the taxonomy as set up by (Bouchet & Rocroi, 2005).
The common periwinkle or winkle (Littorina littorea) is a species of small edible whelk or sea snail, a marine gastropod mollusc that has gills and an operculum, and is classified within the family Littorinidae, the periwinkles.
Conch is a common name that is applied to a number of different medium to large-sized shells.
Conchiolins (sometimes referred to as conchins) are complex proteins which are secreted by a mollusc's outer epithelium (the mantle).
Conus is a genus of predatory sea snails, or cone snails, marine gastropod mollusks in the family Conidae.Bouchet, P.; Gofas, S. (2015). Conus Linnaeus, 1758. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p.
Convergent evolution is the independent evolution of similar features in species of different lineages.
Cornu aspersum, known by the common name garden snail, is a species of land snail.
Cowry or cowrie, plural cowries, is the common name for a group of small to large sea snails, marine gastropod mollusks in the family Cypraeidae, the cowries.
The Cretaceous is a geologic period and system that spans 79 million years from the end of the Jurassic Period million years ago (mya) to the beginning of the Paleogene Period mya.
A ctenidium is a respiratory organ or gill which is found in many mollusks.
Daudebardia are small air-breathing land snails or semi-slugs, terrestrial pulmonate gastropods in the family Oxychilidae, the glass snails.
David R. Lindberg (1948, U.S.A.) is an American malacologist and professor of integrative biology at the University of California, Berkeley.
In biology, detritus is dead particulate organic material (as opposed to dissolved organic material).
As applied to mollusks, the New Latin term diverticulum is an anatomical feature.
Deoxyribonucleic acid (DNA) is a thread-like chain of nucleotides carrying the genetic instructions used in the growth, development, functioning and reproduction of all known living organisms and many viruses.
An estuary is a partially enclosed coastal body of brackish water with one or more rivers or streams flowing into it, and with a free connection to the open sea.
Eulimidae is a family of very small parasitic sea snails, marine gastropod mollusks in the superfamily Eulimoidea.
Euopisthobranchia is a taxonomic clade of snails and slugs in the clade Heterobranchia within the clade Euthyneura.
An extinct in the wild (EW) species is one which has been categorized by the International Union for Conservation of Nature as only known by living members kept in captivity or as a naturalized population outside its historic range due to massive habitat loss.
In biology, extinction is the termination of an organism or of a group of organisms (taxon), normally a species.
In biological classification, family (familia, plural familiae) is one of the eight major taxonomic ranks; it is classified between order and genus.
Fertilisation or fertilization (see spelling differences), also known as generative fertilisation, conception, fecundation, syngamy and impregnation, is the fusion of gametes to initiate the development of a new individual organism.
The foot (plural feet) is an anatomical structure found in many vertebrates.
A fossil (from Classical Latin fossilis; literally, "obtained by digging") is any preserved remains, impression, or trace of any once-living thing from a past geological age.
Freshwater snails are gastropod mollusks which live in freshwater.
The Furongian is the fourth and final series of the Cambrian.
A ganglion is a nerve cell cluster or a group of nerve cell bodies located in the autonomic nervous system and sensory system.
The gastropod shell is part of the body of a gastropod or snail, a kind of mollusc.
Jean Léopold Nicolas Frédéric, Baron Cuvier (23 August 1769 – 13 May 1832), known as Georges Cuvier, was a French naturalist and zoologist, sometimes referred to as the "founding father of paleontology".
The ghost slug (Selenochlamys ysbryda) is a species of predatory air-breathing land slug.
A gill is a respiratory organ found in many aquatic organisms that extracts dissolved oxygen from water and excretes carbon dioxide.
A gonad or sex gland or reproductive gland is a mixed gland that produces the gametes (sex cells) and sex hormones of an organism.
The great tit (Parus major) is a passerine bird in the tit family Paridae.
Greek (Modern Greek: ελληνικά, elliniká, "Greek", ελληνική γλώσσα, ellinikí glóssa, "Greek language") is an independent branch of the Indo-European family of languages, native to Greece and other parts of the Eastern Mediterranean and the Black Sea.
In ecology, a habitat is the type of natural environment in which a particular species of organism lives.
A head is the part of an organism which usually includes the eyes, ears, nose, and mouth, each of which aid in various sensory functions such as sight, hearing, smell, and taste, respectively.
Helcionella is a genus of helcionellid, a fossil marine invertebrate animal that is considered to be a mollusk and may possibly be a gastropod.
Helicidae is a large, diverse family of small to large, air-breathing land snails, sometimes called the "typical snails." A number of species in this family are valued as food items, including Cornu aspersum (formerly Helix aspersa) the brown or garden snail, and Helix pomatia the "escargot".
Helix is a genus of large air-breathing land snails, terrestrial pulmonate gastropod molluscs.
Helix pomatia, common names the Roman snail, Burgundy snail, edible snail or escargot, is a species of large, edible, air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Helicidae.
Hemocyanins (also spelled haemocyanins and abbreviated Hc) are proteins that transport oxygen throughout the bodies of some invertebrate animals.
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.
Hemolymph, or haemolymph, is a fluid, analogous to the blood in vertebrates, that circulates in the interior of the arthropod body remaining in direct contact with the animal's tissues.
A herbivore is an animal anatomically and physiologically adapted to eating plant material, for example foliage, for the main component of its diet.
In biology, a hermaphrodite is an organism that has complete or partial reproductive organs and produces gametes normally associated with both male and female sexes.
Heterobranchia, the heterobranchs (meaning "different-gilled snails"), is a taxonomic clade of snails and slugs, which includes marine, aquatic and terrestrial gastropod mollusks.
Hibernation is a state of inactivity and metabolic depression in endotherms.
A hydrothermal vent is a fissure in a planet's surface from which geothermally heated water issues.
The hypobranchial gland is a glandular structure which is part of the anatomy of many mollusks, including several different families of gastropods, and also many protobranch bivalves.
Insects or Insecta (from Latin insectum) are hexapod invertebrates and the largest group within the arthropod phylum.
The intertidal zone, also known as the foreshore and seashore and sometimes referred to as the littoral zone, is the area that is above water at low tide and under water at high tide (in other words, the area between tide marks).
Invertebrates are animals that neither possess nor develop a vertebral column (commonly known as a backbone or spine), derived from the notochord.
The Jurassic (from Jura Mountains) was a geologic period and system that spanned 56 million years from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period Mya.
A land snail is any of the numerous species of snail that live on land, as opposed to sea snails and freshwater snails.
A larva (plural: larvae) is a distinct juvenile form many animals undergo before metamorphosis into adults.
Limestone is a sedimentary rock, composed mainly of skeletal fragments of marine organisms such as coral, forams and molluscs.
Limpets are aquatic snails with a shell that is broadly conical in shape and a strong, muscular foot.
A living fossil is an extant taxon that closely resembles organisms otherwise known only from the fossil record.
A love dart (also known as a gypsobelum) is a sharp, calcareous or chitinous dart which some hermaphroditic land snails and slugs create.
Lower Heterobranchia, also known as the Allogastropoda, is a group of rather specialized, highly evolved sea slugs and sea snails, (marine gastropod mollusks) within the clade Heterobranchia.
The lungs are the primary organs of the respiratory system in humans and many other animals including a few fish and some snails.
Malacologia is a peer-reviewed scientific journal in the field of malacology, the study of mollusks.
The mantle (also known by the Latin word pallium meaning mantle, robe or cloak, adjective pallial) is a significant part of the anatomy of molluscs: it is the dorsal body wall which covers the visceral mass and usually protrudes in the form of flaps well beyond the visceral mass itself.
In biology, mating (or mateing in British English) is the pairing of either opposite-sex or hermaphroditic organisms, usually for the purposes of sexual reproduction.
The mating of gastropods is a vast and varied topic, because the taxonomic class Gastropoda is very large and diverse, a group comprising sea snails and sea slugs, freshwater snails and land snails and slugs.
A mechanoreceptor is a sensory receptor that responds to mechanical pressure or distortion.
The Mesozoic Era is an interval of geological time from about.
Mitochondrial DNA (mtDNA or mDNA) is the DNA located in mitochondria, cellular organelles within eukaryotic cells that convert chemical energy from food into a form that cells can use, adenosine triphosphate (ATP).
The mitochondrion (plural mitochondria) is a double-membrane-bound organelle found in most eukaryotic organisms.
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.
In cladistics, a monophyletic group, or clade, is a group of organisms that consists of all the descendants of a common ancestor.
Mudflats or mud flats, also known as tidal flats, are coastal wetlands that form when mud is deposited by tides or rivers.
In biology, a mutation is the permanent alteration of the nucleotide sequence of the genome of an organism, virus, or extrachromosomal DNA or other genetic elements.
Neomphaloidea is a superfamily of deep-sea snails or limpets, marine gastropod mollusks.
Neontology is a part of biology that, in contrast to paleontology, deals with living (or, more generally, recent) organisms.
The nephridium (plural nephridia) is an invertebrate organ which occurs in pairs and performs a function similar to the vertebrate kidney.
Neritimorpha is a taxonomic grouping, an unranked clade of snails, gastropod mollusks.
Nudibranchs are a group of soft-bodied, marine gastropod molluscs which shed their shells after their larval stage.
Nudipleura are a clade of sea snails and sea slugs, marine gastropod mollusks within the large clade Heterobranchia.
Olfaction is a chemoreception that forms the sense of smell.
The operculum, meaning little lid, (plural: opercula or operculums) is a corneous or calcareous anatomical structure like a trapdoor which exists in many (but not all) groups of sea snails and freshwater snails, and also in a few groups of land snails.
Opisthobranchs are a large and diverse group of specialized complex gastropods that used to be united in the subclass Opisthobranchia, but are no longer considered to represent a monophyletic grouping because it contains land snails and slugs, the Pulmonata.
The Ordovician is a geologic period and system, the second of six periods of the Paleozoic Era.
The osphradium is an olfactory organ in certain molluscs, linked with the respiration organ.
The Paleozoic (or Palaeozoic) Era (from the Greek palaios (παλαιός), "old" and zoe (ζωή), "life", meaning "ancient life") is the earliest of three geologic eras of the Phanerozoic Eon.
Panpulmonata is a taxonomic clade of snails and slugs in the clade Heterobranchia within the clade Euthyneura.
In taxonomy, a group is paraphyletic if it consists of the group's last common ancestor and all descendants of that ancestor excluding a few—typically only one or two—monophyletic subgroups.
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.
The Patellogastropoda, common name true limpets and historically called the Docoglossa, are members of a major phylogenetic group of marine gastropods, treated by experts either as a clade or as a taxonomic order.
The peripheral nervous system (PNS) is one of the two components of the nervous system, the other part is the central nervous system (CNS).
In biology, phenetics (phainein - to appear), also known as taximetrics, is an attempt to classify organisms based on overall similarity, usually in morphology or other observable traits, regardless of their phylogeny or evolutionary relation.
A phylogenetic tree or evolutionary tree is a branching diagram or "tree" showing the evolutionary relationships among various biological species or other entities—their phylogeny—based upon similarities and differences in their physical or genetic characteristics.
In biology, a phylum (plural: phyla) is a level of classification or taxonomic rank below Kingdom and above Class.
Planorbidae, common name the ramshorn snails or ram's horn snails, is a family of air-breathing freshwater snails, aquatic pulmonate gastropod mollusks.
The Pleistocene (often colloquially referred to as the Ice Age) is the geological epoch which lasted from about 2,588,000 to 11,700 years ago, spanning the world's most recent period of repeated glaciations.
Poland (Polska), officially the Republic of Poland (Rzeczpospolita Polska), is a country located in Central Europe.
Poleumita is an extinct genus of medium-sized sea snails, fossil marine gastropods in the family Euomphalidae.
Predation is a biological interaction where a predator (a hunting animal) kills and eats its prey (the organism that is attacked).
Prosobranchia was a large taxonomic subclass of sea snails, land snails and freshwater snails.
Protein primary structure is the linear sequence of amino acids in a peptide or protein.
A protoconch (meaning first or earliest or original shell) is an embryonic or larval shell which occurs in some classes of molluscs, e.g., the initial chamber of an ammonite or the larval shell of a gastropod.
Pulmonata, or "pulmonates", is an informal group (previously an order, and before that a subclass) of snails and slugs characterized by the ability to breathe air, by virtue of having a pallial lung instead of a gill, or gills.
Purbeck Marble is a fossiliferous limestone found in the Isle of Purbeck, a peninsula in south-east Dorset, England.
The radula (plural radulae or radulas) is an anatomical structure that is used by mollusks for feeding, sometimes compared to a tongue.
The reproductive system of gastropods (slugs and snails) varies greatly from one group to another within this very large and diverse taxonomic class of animals.
A rhinophore is one of a pair of chemosensory club-shaped, rod-shaped or ear-like structures which are the most prominent part of the external head anatomy in sea slugs, marine gastropod opisthobranch mollusks such as the nudibranchs (Nudibranchia), Sea Hares, (Aplysiomorpha) and sap-sucking sea slugs (Sacoglossa).
Scavenging is both a carnivorous and a herbivorous feeding behavior in which the scavenger feeds on dead animal and plant material present in its habitat.
Scenella is an extinct genus of fossil invertebrate animal which is generally considered to be a mollusc; at various times it has been suggested that this genus belongs with the gastropods, the monoplacophorans, or the helcionellids, although no firm association with any of these classes has been established.
Sea snail is a common name for snails that normally live in saltwater, in other words marine gastropods.
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.
Seaweed or macroalgae refers to several species of macroscopic, multicellular, marine algae.
A sense is a physiological capacity of organisms that provides data for perception.
Sexual selection is a mode of natural selection where members of one biological sex choose mates of the other sex to mate with (intersexual selection), and compete with members of the same sex for access to members of the opposite sex (intrasexual selection).
The Silurian is a geologic period and system spanning 24.6 million years from the end of the Ordovician Period, at million years ago (Mya), to the beginning of the Devonian Period, Mya.
A simple eye (sometimes called a pigment pit) refers to a type of eye form or optical arrangement that contains a single lens.
A siphon is an anatomical structure which is part of the body of aquatic molluscs in three classes: Gastropoda, Bivalvia and Cephalopoda (members of these classes include saltwater and freshwater snails, clams, octopus, squid and relatives).
The siphonal canal is an anatomical feature of the shells of certain groups of sea snails within the clade Neogastropoda.
Slug, or land slug, is a common name for any apparently shell-less terrestrial gastropod mollusc.
Snail is a common name loosely applied to shelled gastropods.
Social learning (social pedagogy) is learning that takes place at a wider scale than individual or group learning, up to a societal scale, through social interaction between peers.
In biology, a species is the basic unit of classification and a taxonomic rank, as well as a unit of biodiversity, but it has proven difficult to find a satisfactory definition.
Sphincterochila boissieri is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Sphincterochilidae.
The statocyst is a balance sensory receptor present in some aquatic invertebrates, including molluscs, bivalves, cnidarians, ctenophorans, echinoderms, cephalopods, and crustaceans.
The stomach (from ancient Greek στόμαχος, stomachos, stoma means mouth) is a muscular, hollow organ in the gastrointestinal tract of humans and many other animals, including several invertebrates.
Strepsodiscus is an extinct genus of very primitive fossil snail-like molluscs from the early part of the Late Cambrian (Dresbachian Age) of North America.
Sussex Marble is a fossiliferous freshwater limestone material which is prevalent in the Weald Clay of parts of Kent, East Sussex and West Sussex in southeast England.
The Systellommatophora (synonym Gymnomorpha) is a clade of primitive, air-breathing slugs, according to the taxonomy of the Gastropoda (Bouchet & Rocroi, 2005).
Taxonomy is the science of defining and naming groups of biological organisms on the basis of shared characteristics.
The taxonomy of the Gastropoda as it was revised in 2005 by Philippe Bouchet and Jean-Pierre Rocroi is a system for the scientific classification of gastropod mollusks.
In zoology, a tentacle is a flexible, mobile, elongated organ present in some species of animals, most of them invertebrates.
Testacella is genus of small to medium-large, predatory, air-breathing, land slugs.
Torsion is a gastropod synapomorphy which occurs in all gastropods during larval development.
A trace fossil, also ichnofossil (ιχνος ikhnos "trace, track"), is a geological record of biological activity.
A transfer RNA (abbreviated tRNA and formerly referred to as sRNA, for soluble RNA) is an adaptor molecule composed of RNA, typically 76 to 90 nucleotides in length, that serves as the physical link between the mRNA and the amino acid sequence of proteins.
A transposable element (TE or transposon) is a DNA sequence that can change its position within a genome, sometimes creating or reversing mutations and altering the cell's genetic identity and genome size.
The tree of life is a widespread myth (mytheme) or archetype in the world's mythologies, related to the concept of sacred tree more generally,Giovino, Mariana (2007).
A trochophore (also spelled trocophore) is a type of free-swimming planktonic marine larva with several bands of cilia.
Trochulus hispidus, previously known as Trichia hispida, common name, the "hairy snail", is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Hygromiidae, the hairy snails and their allies.
Uric acid is a heterocyclic compound of carbon, nitrogen, oxygen, and hydrogen with the formula C5H4N4O3.
A mollusc valve is each articulating part of the shell of a mollusc.
A veliger is the planktonic larva of many kinds of sea snails and freshwater snails, as well as most bivalve molluscs (clams) and tusk shells.
Vetigastropoda is a major taxonomic group of sea snails, marine gastropod mollusks that form a very ancient lineage.
Viviparus, common name the river snails, is a genus of large, freshwater snails with an operculum, aquatic gastropod mollusks.
Whelk is a common name that is applied to various kinds of sea snail.
Xerocrassa seetzeni is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Hygromiidae, the hairy snails and their allies.
YouTube is an American video-sharing website headquartered in San Bruno, California.
Anatomy of gastropods, Diversity of gastropods, Gasteropod, Gasteropoda, Gasteropods, Gastropod, Gastropod anatomy, Gastropods, Heterogastropoda, Slugs and snails, Snails and slugs, Univalve, Univalves, Univalvia.