gonopore

External opening of the oviduct or vas deferens [Holdich and Jones, 1983].

Outlet for genital products, generally placed constantly in different crustaceans. (Syn. sexual pore) [Moore and McCormick, 1969].

Outlet for genital products. (Syn. sexual pore) [McLaughlin, 1980].

(Order Cladocera):

Opening of male or female reproductive system to exterior. In male, located either behind last pair of trunk appendages, on postabdomen, or terminally near caudal furca. In female, see vulva. (single, paired) (see also penis) [Stachowitsch, 1992].

(Order Notostraca):

Opening of male or female reproductive system to exterior on last (11^th) thoracic segment. In male, gonopores open on thoracopods; in female, oviducts open into ovisacs. (Syn. genital pore) [Stachowitsch, 1992].

(Order Diplostraca):

One of two openings of male or female reproductive system to exterior on 11^th trunk somite. (Syn. genital pore) [Stachowitsch, 1992].

(Order Anostraca):

Oviduct, penis [Stachowitsch, 1992].

(Class Cephalocarida):

Pair of common openings of male and female reproductive systems, one located on posterior face of protopod of each appendage (thoracopod) of sixth thoracomere. (Syn. genital opening) [Stachowitsch, 1992].

(Order Cumacea):

Opening of reproductive system to exterior. In female, pair of pores on first segments (coxae) of third pereopods; in male, pair of pores on ventral surface (sternite) of last (fifth) pereon segment [Stachowitsch, 1992].

(Order Tanaidacea):

Opening of male or female reproductive system to exterior. In male, pair of pores on genital cone(s) on last (seventh) pereonite; in female, pair of pores ventrally on fifth pereonite [Stachowitsch, 1992].

(Order Decapoda):

One of two openings of reproductive system to exterior. In male, pore on basal segment (coxa) of last (eighth) thoracopods; in female, pore on coxa of sixth thoracopods (third pereopods) [Stachowitsch, 1992].

(Order Amphipoda):

In female reproductive system, opening of each oviduct to exterior. Located on ventral surface (sternite) of fifth pereon segment (pereonite). (Syn. genital pore) See: penis [Stachowitsch, 1992].

(Order Isopoda):

In female reproductive system, opening of each oviduct to exterior; located on ventral surface (sternite) of fifth pereon segment (pereonite). See: penis [Stachowitsch, 1992].

(Order Mysida):

Opening of reproductive system to exterior. In female, pair of pores, one located at base of each thoracopod of sixth thoracic somite. For male, see penis [Stachowitsch, 1992].

(Order Stomatopoda):

Opening of male or female reproductive system to exterior. In female, single opening on underside of sixth thoracic segment (thoracomere); in female, pore at tip of penis on each appendage (thoracopod) of eight thoracomere [Stachowitsch, 1992].

(Order Leptostraca):

Opening of reproductive system to exterior. In male, opening at tip of papilla (genital papilla) on coxa of each eighth thoracopod; in female, opening on coxa of each sixth thoracopod [Stachowitsch, 1992].

(Subclass Branchiura):

In male reproductive system, unpaired opening on ventral surface of last thoracic somite (fourth thoracomere). In female, see vagina. (Syn. genital aperture) [Stachowitsch, 1992].

(Subclass Cirripedia):

In female reproductive system, opening of each oviduct to exterior; located on first thoracic somite at or near bases of first cirri. For male see penis [Stachowitsch, 1992].

(Subclass Copepoda):

Opening to reproductive system to exterior on ventral surface (sternite) of first abdominal segment (genital somite). In male, one or two openings, in female, either paired or in the form of a common atrium. (Syn. genital pore) [Stachowitsch, 1992].

(Subclass Copepoda):

The external opening of the oviduct in the female and of the vas deferens in the male [Boxshall and Halsey, 2004].

(Subclass Mystacocarida):

Single opening of male or female reproductive system; located on right side of ventral surface (sternite) of third thoracoabdominal somite [Stachowitsch, 1992].

(Class Ostracoda):

Opening of male or female reproductive system to exterior. In female, pore or larger opening (also termed uterine opening) of each oviduct on genital lobe. In male, paired or unpaired opening of vasa deferentia in front of caudal rami between or on penes. (See also vagina) [Stachowitsch, 1992].

(Class Remipedia):

Opening of male or female reproductive system to exterior. Two gonopores are present, one on 7^th trunk segment (female), one on 14^th trunk segment (male), latter borne on a genital papilla. (Syn. genital pore) [Stachowitsch, 1992].

(Superorder Syncarida):

Opening of reproductive system of exterior. In male, single or paired opening on ventral surface (sternite) of last (eighth) thoracic somite. In female, pair of pores on firs segments (coxae) of sixth thoracopods [Stachowitsch, 1992].

(Order Thermosbaenacea):

Openings of reproductive system to exterior. In female, pair of pores on ventral surface (sternite) of sixth thoracic segment; in male, pair of pores on penes on last (eighth) thoracic segment [Stachowitsch, 1992].

(Order Euphausiacea):

Opening of reproductive system to exterior. In female, opening of oviduct on coxae of sixth thoracopods; in d, openings of both vasa deferentia on last (eighth) thoracomere [Stachowitsch, 1992].