anus

(Order Cladocera):

Posterior opening of digestive tract at end of postabdomen. (terminal, on dorsal margin) [Stachowitsch, 1992].

(Order Notostraca):

Posterior opening of digestive tract at end of telson; located between caudal rami and may be covered dorsally by supra-anal plate [Stachowitsch, 1992].

(Order Diplostraca):

Posterior opening of digestive tract at end of telson [Stachowitsch, 1992].

(Order Anostraca):

Posterior opening of digestive tract; located terminally on telson (between caudal rami) [Stachowitsch, 1992].

(Order Cumacea):

Posterior opening of digestive tract. Located at end of last (sixth) pleonite or on ventral surface of telson (in the latter case occasionally divided telson into preanal and postanal parts). Flanked by pair of anal valves [Stachowitsch, 1992].

(Order Tanaidacea):

Posterior opening of digestive tract to exterior. Located on ventral surface of telson [Stachowitsch, 1992].

(Order Decapoda):

Posterior opening of digestive tract; located on ventral surface of telson [Stachowitsch, 1992].

(Order Amphipoda):

Posterior opening of digestive tract to exterior; located ventrally at base of telson [Stachowitsch, 1992].

(Order Isopoda):

Posterior opening of digestive tract to exterior; located ventrally at base of telson [Stachowitsch, 1992].

(Order Mysida):

Posterior opening of digestive tract; located on ventral surface of telson [Stachowitsch, 1992].

(Order Stomatopoda):

Posterior opening of digestive tract; located anteroventrally on telson [Stachowitsch, 1992].

(Order Leptostraca):

Posterior opening of digestive tract; located ventrally on telson between caudal rami [Stachowitsch, 1992].

(Subclass Branchiura):

Posterior opening of digestive tract. Located at posterior end between two lobes of abdomen; typically flanked on each side by minute caudal ramus [Stachowitsch, 1992].

(Subclass Cirripedia):

Posterior opening of digestive tract. Located near posteriormost thoracic appendages, i.e., between sixth pair of cirri; in ascothoracican at end of abdomen [Stachowitsch, 1992].

(Subclass Copepoda):

Posterior opening of digestive tract. Located terminally, on dorsal surface of last abdominal segment (anal somite); covered by anal operculum [Stachowitsch, 1992].

(Subclass Mystacocarida):

Posterior opening of digestive tract; located on ventral surface of telson (anal somite) [Stachowitsch, 1992].

(Class Ostracoda):

Posterior opening of digestive tract at end of body (thorax/abdomen). May be located either dorsal or ventral to caudal rami [Stachowitsch, 1992].

(Superorder Syncarida):

Posterior opening of digestive tract. Located on telson. (terminal, ventral) [Stachowitsch, 1992].

(Order Thermosbaenacea):

Posterior opening of digestive tract to exterior; apparently terminal [Stachowitsch, 1992].

(Order Euphausiacea):

Posterior opening of digestive tract; located ventrally at posterior margin of last (sixth) abdominal somite (pleomere) [Stachowitsch, 1992].