ANAL SOMITE
Postsegmental plate or lobe bearing anus [Brusca and Brusca, 2002].
(Order Leptostraca):
Telson. (Syn. anal segment) [Stachowitsch, 1992].
(Subclass Copepoda):
Last (fifth) segment of abdomen; bears anus dorsally and pair of caudal rami posteriorly. Occasionally termed telson [Stachowitsch, 1992].
(Subclass Copepoda):
The posterior somite and abdominal somite onto which the anus opens. The anal somite bears a paired appendage called the caudal rami. The anal somite is considered the first abdominal somite, despite its posterior position, because it is the first abdominal somite to appear during post-embryonic development [Ferrari and Dahms, in press].
(Subclass Mystacocarida):
Telson [Stachowitsch, 1992].