(Balss, 1922)
Carapace moderately broad (breadth about 1.7 times length); surface with elevated areas, whose granulation is distinct and which are separated by the furrows between the regions; front quadridentate, median teeth smaller than lateral ones; antero-lateral borders with 9 teeth, last one much larger than the preceeding ones and projecting sideways; postero-lateral junction rounded. Antero-external angle of merus of third maxillipeds markedly produced into a lobe. Chelipeds with hand extremely slender, much less massive than arm; merus with 2 spines on posterior border, anterior border with 7 spines; carpus with 2 spines; upper surface of palm with 2 distal spines. Posterior border of swimming leg with the usual fringing hairs. (Türkay 1995)
Postero-lateral junction of carapace rounded; hand of cheliped extremely slender, much less massive than arm; 7 spines on anterior border of arm. (Davie 1999)
Type locality: Fukuura, west of Sagami Bay, Japan.
Range: Japan - Sagami Bay (Balss, 1922c).