Definitions

(Taxon-specific: Order Amphipoda) One of several tubular outpocketings of digestive tract. According to position, one may distinguish 1) two pairs of posteriorly directed lateral ceca (two dorsal and two ventral) arising at stomach/midgut border and extending through most of body, 2) single or paired, anteriorly directed ceca arising mid-dorsally at stomach/midgut border, and 3) single or paired, anteriorly directed ceca arising from posterior end of midgut. In certain amphipods may also refer to large, unpaired pouch into which esophagus opens.
(syn. cecum) [Stachowitsch, 1992]
(Taxon-specific: Order Isopoda) One of up to three pairs of elongate outpocketings of digestive tract. Originates in anterior region of pereon at border of foregut and hindgut and extends through most of pereon.
(syn. digestive cecum, hepatic cecum) [Stachowitsch, 1992]
(Taxon-specific: Order Leptostraca) One of up to several pairs of variously developed digestive organs extending either anteriorly or posteriorly from anterior end of midgut. Relatively short, anteriorly directed pair of dorsal ceca are termed dorsal ceca. (sac-like, trilobed) (See also rectal cecum).
(syn. digestive gland, diverticulum) [Stachowitsch, 1992]
(Taxon-specific: Order Euphausiacea) Dorsal cecum. hepatic gland. [Stachowitsch, 1992]