de Haan, 1835
Carapace hairy, granulation not evenly spread, distinct on gastric, cardiac, and parts of mesobranchial region; transverse granular lines on frontal, protogastric and mesogastric regions, epibranchial line interrupted at the cervical groove and across midline; front with 6 acute teeth, medians the most prominent, submedians on a higher plane, laterals the narrowest; antero-lateral borders with 6 teeth, first truncate and notched on outer border, acute at tip, sixth acute, directed forwards; postero-lateral junctions rounded. Antennal flagellum excluded from orbit. Chelipeds slightly heterochelous; merus with 4-5 strong spines on anterior border, sometimes with additional granules, posterior border smooth; carpus with a strong internal spine, outer border with 3 spinules; palm with 4 spines on upper border, all faces except upper face with squamiform markings. Merus of swimming leg with a subdistal posterior spine, propodus with a few spinules on posterior border near distal end. (Türkay 1995)
Antennal flagellum excluded from orbital hiatus; posterior border of cephalothorax curved, forming curved postero-lateral junction; 6 sharp antero-lateral teeth of which at least 5 are large; no distinct cardiac ridges on carapace; anterior border of arm of cheliped with 3 or more spines; 4 spines on hand of cheliped; hand of cheliped not swollen, under surface strongly squamiform. (Davie 1999)
Type locality: Japan.
Range: Persian Gulf (Stephensen, 1945, Apel & Spiridonov, 1998); Gulf of Oman (Apel & Spiridonov, 1998); India - off Ganjam coast (Alcock, 1899a), off River Hooghly (Chopra, 1935); Gulf of Martaban (Alcock, 1899a); Japan - (de Haan, 1835, Parisi, 1916), Kochi (Ortmann, 1893), Sagami Bay and Tokyo (Parisi, 1916), Tanabe, Tosa Bay, Uwajima, east of Kagoshima, and Koshiki-jima (Yokoya, 1933), Shimoda (Sakai, 1935), Tateyama Bay, Shimoda, Tosa Bay and Nagasaki (Sakai, 1939), Sagami Bay (Sakai, 1965b), Sagami Bay (Stephenson & Rees, 1968c), Tokyo Bay, Sagami Bay, Shimoda, Mikawa Bay, Wagu, Kii Nagashima, Kii Minabe, Tosa Bay, and Nagasaki (Sakai, 1976a), off Kochi (Miyake, 1983), Tosa Bay and Kii Minabe (Apel & Spiridonov, 1998); Korea - Cheju-do (Kim, 1970, 1973); East China Sea - off Chi-lung, Taiwan (Takeda & Miyake, 1969d), south of Danjo-gunto (Takeda, 1975a); Taiwan - Chi-lung and I-lan Province (Huang & Yu, 1997); China - Hong Kong (Stimpson, 1907), Fuzhou (Shen, 1940b), Guangxi, Guangdong, and Fujian (Dai & Yang, 1991); South China Sea - off Tioman Island (Shen, 1937), Nansha Islands (Dai & Xu, 1991); Philippines - north of Lubang Island and Verde Island Passage (Moosa, 1981); Indonesia - Borneo Bank, Java Sea and Flores Sea (Leene, 1938), Madura Strait (Stephenson, 1972a); Australia - off Newcastle (Whitelegge, 1900), Newcastle and Botany Bay (Stephenson et al., 1957), N. of Roebourne (Stephenson, 1961), Arnhem Bay, N.T., and Cape Moreton (Stephenson & Rees, 1968c), mid-eastern Queensland (Davie & Short, 1989), Gulf of Carpentaria; 20-200 m.