Pseudocumatidae Sars 1878

Pseudocumatidae is a family of crustaceans of the order Cumacea. Its members have a small, free telson. The uropods bear endopods (interior branch) on one segment. The males have two pairs of rather rudimentary pleopods and the flagella of the second antenna reach far beyond the pereon. In females the second antenna is much smaller than the first antenna.

Telson present, small. Uropod inner ramus uniarticulate. Male pleopods 2 pairs, somewhat rudimentary, without external process on inner ramus. Number free thoracic somites never reduced. Exopods on maxillipeds and the following combinations of pereopods: in the male, 1-4; in the female, 2 + 2 rudimentary. Mandible naviculoid, with large section dorsal to molar. Branchial apparatus with narrow gill plates.