zenker's organ
(Class Ostracoda):
In male reproductive system, complex type of ejaculatory duct at end of vas deferens; serves as pump for elimination of giant sperm [Stachowitsch, 1992].
(Class Ostracoda):
Muscular sperm pump (ejaculatory pump) located dorsally within male body (Cypridocopina) or interlamellar cavity (Sigilliocopina) [Cohen, Peterson, and Maddocks, in press].

Crustacea glossary. . 2011.

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