(H. Milne Edwards, 1853)
Carapace without transverse ridges or lines on cardiac and intestinal regions, transverse ridges on branchial regions fine and curved, cervical groove indistinct; lateral margins distinctly converging backwards behind the epibranchial teeth, antero-lateral margin strongly convex and sharply keeled, postero-lateral margin obtuse, not keeled. Epistome ill defined. Upper border of buccal cavern m-shaped, confluent with epistome. Sternite of the chelipeds pubescent. Lower margin of merus of ambulatory legs rounded and without any serration at its distal extremity. (Türkay 1995)
Type locality: Australia.
Range: Red Sea; east coast of Africa; Madagascar - Toamasina (Crosnier, 1965); Réunion; Mauritius (Ortmann, 1894a, Bouvier, 1915b, Michel, 1964); Laccadive Islands (Alcock, 1900b); Andaman Islands (Alcock, 1900b); Nicobar Islands (Alcock, 1900b); north Sumatra; Japan - Ogasawara-shoto (Stimpson, 1858b, 1907), Northern Daito-jima (Sakai, 1939), Hachijo-jima (Sakai, 1954, 1976), Tosa Bay, Kagoshima, Amami-shoto, Yaeyama-retto, and N. and S. Daito-jima (Sakai, 1976a), Okinawa-jima (Miyake, 1983); Taiwan - (Dai & Yang, 1991), Tai-tung (Sakai, 1939, Lin, 1949); Papua New Guinea - Buka and New Ireland (Sendler, 1923); Solomon Islands - Stewart Islands (Sendler, 1923); Australia; New Caledonia - Ile des Pins (Takeda & Nunomura, 1976); Fiji (Miers, 1886); Cook Islands - Niue, Rarotonga, Atiu, and Mittiaro (Sendler, 1923); Hawaiian Islands; Tahiti (Ortmann, 1894a); Tuamotu Archipelago - Rimitara and Makatea (Sendler, 1923); Kermadec Islands (Chilton, 1911).