Marine decapod crustacean. Large deep-sea crab; body hexagonal, widest anteriorly, its surface uneven but rather smooth, with grooves. Front with 4 short and broad teeth, no median tooth; anterolateral margin with 5 blunt, wide, obscure teeth (outer angle of orbit included), of which the second and fourth are particularly indistinct. Chelipeds slightly unequal in shape and size; last 4 pairs of legs equal or almost so, smooth, without hairs or spines; meri without distal spine; dactyls dorsoventrally flattened. Colour: dirty brownish or yellowish, or a rather uniform colouring without distinct pattern. Maximum length: carapace to 14 cm long and 16 cm wide.