Length to 140 (females, Cystisoma magna 1) - 70 (males) mm. Head with 10-14 marginal denticles on each side, 5-6 pairs of ventral denticles (Cystisoma magna 3). Pereon with especially strong dorsal carina. MD with only one central denticle (Cystisoma magna 2). Posterodistal process of ART 5 of P II strongly serrate. Distal parts of ART 6 of P III-VII not glandular in adult females. Urosoma combined with UR not longer than pleon.