Body very robust; generally very similar to Acidostoma obesum ; urosome segment 1 dorsal margin in female about straight, in male with a broad depression; epimeral plate 3 posterodistal angle rounded. Head short, lateral lobes small; eyes small, rounded. Mandible with molar obsolete. Maxilliped outer plate with a distinct cleft in the distal margin. Antennae short, about equal in length; antenna 1 peduncle article 1 very large, articles 2 and 3 short, in female narrower than article 1, in male almost as broad as article 1, flagellum about 8-articulate, in female article 1 small, in male large, laminar, very densely setose; accessory flagellum 5-articulate. Antenna 2 flagellum about 9-articulate. Gnathopod 1 simple, robust, basis broad, propodus much narrower than the carpus and tapering distally, posterior margin finely toothed with three marginal spines and a few long setae. Gnathopod 2 elongate, slender, propodus more than half the length of the carpus, dactylus absent. Pereiopods 5 to 7 robust, basis, merus and carpus broad. Uropod 1 peduncle spinose; uropod 2 peduncle broad, rami short; uropod 3 very small, rami about equal in length. Telson longer than broad, cleft to the mid-point.
Up to 8 mm.
Yellowish, sometimes with reddish markings.
Depth range from 0 to 200 metres. Often with Actinostola callosa .
North-East Atlantic, North Sea, Öresund, Norway, north-west France; also recorded from south and west Africa.