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...

monophyletic group uniting several polychaetes and the monophyletic class Clitellata. It is the sister group of Errantia. The phylogeny of polychaetes is slowly...

is a name often given to a variety of large invertebrates in the class Clitellata, many being from the family Megascolecidae. It may refer to: Giant Gippsland...

Haplotaxida might eventually be up-ranked to subclass status within the Clitellata or an expanded Oligochaeta, with the present suborders advancing to order...

Palaeacanthocephala (ancient thornheads) Polyacanthocephala Acoela Nemertodermatida Clitellata (earthworms) Polychaeta (bristle worms) Sipuncula (peanut worms) Arachnida...

"Molecular evidence for the non-monophyletic status of Naidinae (Annelida, Clitellata, Tubificidae)". Molecular Phylogenetics and Evolution. 40 (2): 570–584...

different from that of other annelids, including other members of the Clitellata. In leeches there are no septa, the connective tissue layer of the body...

Pietro (2000). "Evolution and biogeography of megadriles (Annelida, Clitellata)". Italian Journal of Zoology. 67–2 (2): 179–201. doi:10.1080/11250000009356313...

ancestor of the highly diverse sister groups Errantia and Sedentaria (Clitellata and related polychaetes) and all the descendants of that ancestor. Most...

List of annelid families describes the taxa relationships in the phylum Annelida, which contains more than 17,000 extant species including ragworms, earthworms...