Ortmann, 1893
A rather small species; the carapace more elongate than its congeners on account of the less convex hepatic and branchial protuberances. The pseudorostral spines are divergent at an angle of about 40° and are usually about one third the length of the carapace. The preocular spine small, the postocular spine larger than the hepatic spine and still more so than the branchial spine, the last named spine projecting upwards and slightly backwards. The gastric tubercle is obtuse, cardiac spine very prominent, and the intestinal tubercle a little smaller.
The merus and carpus of the chelipeds are not markedly carinate, the ambulatory legs are very slender but usually naked. (Sakai, 1938: 260)
Type locality: Sagami Bay, Japan.
Range: Japan - Sagami Bay and Maizuru (Ortmann, 1893), Mutsu Bay (Yokoya, 1928), Kinkazan, between Todo-saki and Kinkazan, Siriya-zaki, Shioya-zaki, between Shioya-zaki and Inubo-zaki, Inubo-zaki, Sagami Bay, Shimoda, Suno-saki, Suruga Bay, between Omae-zaki and Iro-zaki, Omae-zaki, Lake Hamana, Toba, Owase, Shiono-misaki, Tanabe, Kii Strait, Muroto-misaki, southern Miyazaki Prefecture, Bungo Strait, Koshiki-jima, Goto-retto, Nagato, off Hamada and west of Mikuni (Yokoya, 1933), Shimoda (Sakai, 1935), Sagami Bay, Shimoda and Nagasaki (Sakai, 1938a), Sagami Bay (Sakai, 1965b), south off Tsushima (Takeda, 1973c), from Mutsu Bay to coast of Kyushu (Sakai, 1976a), Ashizuri-misaki (Miyake, 1983), Sagami Bay, Shimonoseki and Goto-retto (Griffin & Tranter, 1986a), Suruga Bay (Takeda, 1997); Korea - Cheju-do (Kim & Chang, 1985); China - Fujian and Shandong Peninsula (Dai & Yang, 1991); East China Sea (Takeda & Miyake, 1969e, 1972); 35-540m.