Stimpson, 1858
Carapace is smooth and naked (covered with velvet according to Alcock) and extremely convex from before backwards; the postero-lateral borders are only slightly convergent backward but the antero-lateral ones are very strongly convergent forward; near the junction of both borders are found three low lobules shallowly divided by two indentations (the margins are entire according to Tesch); both borders beaded with fine granules and fringed with soft hairs. The front is very narrow, divided into two rounded lobes by a very shallow median notch. The orbits are suboval, entirely occupied by the eyes, which have no pigment. The merus of external maxilliped is rounded at antero-external angle. The antennal flagellum is slender and naked.
Chelipeds are asymmetrical; in major cheliped, the wrist is tomentose near the distal margin, the proximal surface of palm and movable finger also tomentose; otherwise the surface is naked and smooth. In minor cheliped, the wrist and palm are covered with velvet excepting the glabrous middle portion of the outer surface, the fingers are also villose besides the cutting edges and the distal half. Ambulatory legs are fringed with coarse hairs; the first and last pairs are subequal and a little shorter than the second and third pairs which are also subequal. (T. Sakai, 1939: 570)
Type locality: Hong Kong.
Range: Persian Gulf (Stephensen, 1945); Bay of Bengal (Alcock, 1900b); Japan - Tokyo Bay (Ortmann, 1984), Sagami Bay, Izu Shimoda, south of Hamana Lake, Kii Minabe, south of Satsuma, north of Nagato, and off Tottori (Yokoya, 1933), Sagami Bay and Shimoda (Sakai, 1939), Sagami Bay, Shimoda, and Kii Minabe (Sakai, 1976a), Amakusa (Yamaguchi et al., 1976), Shiono-misaki (Takeda, 1979a), Oshima Passage, Amami-Oshima (Takeda, 1989); Taiwan - Tingch'ieting (Lin, 1949); Hong Kong (Stimpson, 1858b, Alcock, 1900b); Gulf of Thailand; Singapore; Indonesia - Sumba and Timor (Tesch, 1918b), Sumatra; 30-60 m.