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16 relations: Annelid, Arhynchobdellida, Branchiobdellida, Cladistics, Class (biology), Clitellata, Hirudo medicinalis, Leech, Oligochaeta, Order (biology), Rhynchobdellida, Sister group, Species, Sydney, Symplesiomorphy, Synonym (taxonomy).
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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Arhynchobdellida
The proboscisless leeches, Arhynchobdellida, are classified as an order of the Hirudinea.
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Branchiobdellida
Branchiobdellida are an order of leech-like clitellates that are mostly exoparasites of crayfish.
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Cladistics
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.
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Class (biology)
In biological classification, class (classis) is a taxonomic rank, as well as a taxonomic unit, a taxon, in that rank.
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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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Hirudo medicinalis
Hirudo medicinalis, the European medicinal leech, is one of several species of leeches used as "medicinal leeches".
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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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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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Order (biology)
In biological classification, the order (ordo) is.
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Rhynchobdellida
Rhynchobdellida, the jawless leeches, although paraphyletic, are classified as an order of the Hirudinea.
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Sister group
A sister group or sister taxon is a phylogenetic term denoting the closest relatives of another given unit in an evolutionary tree.
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Species
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.
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Sydney
Sydney is the state capital of New South Wales and the most populous city in Australia and Oceania.
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Symplesiomorphy
In phylogenetics, a plesiomorphy, symplesiomorphy or symplesiomorphic character is an ancestral character or trait state shared by two or more taxa.
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Synonym (taxonomy)
In scientific nomenclature, a synonym is a scientific name that applies to a taxon that (now) goes by a different scientific name,''ICN'', "Glossary", entry for "synonym" although the term is used somewhat differently in the zoological code of nomenclature.
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