de Haan, 1837
Carapace about 1.2 times as wide as long, its surface with closely set flattened granules anteriorly and well spaced rounded ones posteriorly; front with slightly rounded lateral lobes and triangular rostrum; lateral spine of carapace massive and very long, clearly exceeding one third of carapace width; posterior margin bearing two cylindrical lobes. Upper margin of cheliped palm with eight teeth; external face with large, rounded tubercles in three diagonal rows and three supplementary ones at base of palmar crest; lower margin serrate. Second to fifth pereiopods with upper border of meri granulated, otherwise nearly smooth, only external surface of merus of fourth pereiopod distinctly granulose. (Türkay 1995)
Type locality: Japan.
Range: Japan - (de Haan, 1837, Galil, 1993, Crosnier, 1997a), Tokyo Bay (Ortmann, 1892), Bungo Strait, Tosa Bay and Goto-retto (Yokoya, 1933), Manazuru (Sakai, 1935), Sagami Bay and Nagasaki (Sakai, 1937a), Amakusa (Miyake et al., 1962), Sagami Bay (Sakai, 1965b), Sagami Bay, Mikawa Bay, Wagu, Kii Nagashima, Kaino, Kii Minabe, Tosa Bay, and Nagasaki (Sakai 1976), Shiono-misaki (Takeda, 1979a), Ashizuri-misaki (Miyake, 1983), near Tokyo, Amakusa and Misaki (Galil, 1993); Korea - Cheju-do (Kim, 1970, 1973); China - Guangxi and Hainan Island (Dai & Yang, 1991); Hong Kong (Galil, 1993); Vietnam (Galil, 1993, Crosnier, 1997a); Philippines - north of Lubang Island (Serène & Vadon, 1981); South China Sea - Nansha Islands (Chen & Xu, 1991); 60-260 m.