Clitellata


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Clitellata

 

a group of annelid worms that includes two classes: Oligochaeta and Hirudinea. The worms are hermaphroditic. They are characterized by a clitellum—a glandular thickening of the skin located in the anterior half of the body. The clitellum forms the cocoon, in which egg fertilization and embryo development occur.

References in periodicals archive ?
Papers on selected groups of annelida include non-leech clitellata, hiradina, phyllodocida, cirratuliformia, sabellida, spionida and problematic annelid groups.
The giant earthworms, as well as the common earthworm, Lumbricus terrestris, taxonomically belong to the Class Clitellata in the Phylum Annelida.