A. Milne Edwards, 1873
A small species, well characterized in having the carapace markedly convergent posteriorly and the dorsal surface marked with smooth striae, resembling those of the young of Pachygrapsus crassipes. The front is not so strongly produced and not so markedly bordered posteriorly by the postfrontal ridges as in crassipes. No tooth behind the external orbital angle, the lateral borders being extremely convergent backwards. The wrist and palm of chelipeds are dorsally smooth, being not markedly striate or tubercular; the merus of ambulatory legs, except that of the first pair, has two acuminate spinules at the distal end of the posterior border. (T. Sakai, 1939: 656)
Type locality: New Caledonia.
Range: Zanzibar (Lenz, 1905); Dar es Salaam (Hartnoll, 1975); Madagascar - Nosy Bé, Nosy Iranja, Toliara and Tolanaro (Crosnier, 1965); Mauritius (Michel, 1964); Seychelles - Praslin (Rathbun, 1911); Mergui Archipelago (Alcock, 1900b); Japan - Kii Peninsula and Northern Daito-jima (Sakai, 1939), Hachijo-jima (Sakai, 1954), Sagami Bay (Sakai, 1965b), Sagami Bay, Kii Nagashima, Kii Minabe, Yoron-jima, Ishigaki-jima and Northern Daito-jima (Sakai, 1976a), Okinawa-jima (Miyake, 1983), Hachijo-jima, Tosa Bay, Okinoerabu-jima, and Yoron-jima (Muraoka, 1998), Ogasawara-shoto; Taiwan - (Dai & Yang, 1991), Lan Lü (Sakai, 1939, Lin, 1949); South China Sea - Paracel Island (Chen, 1975), Hainan Island and Paracel Islands (Dai & Yang, 1991), Nansha Islands (Chen & Xu, 1991); Indonesia - Edam Island and Noordwachter Island (de Man, 1888d), Karakelong Islands (Tesch, 1918a); New Britain - Kokopo near Rabaul (Takeda & Nunomura, 1976); Vanuatu - Torres Islands (Takeda & Nunomura, 1976); New Caledonia - (A. Milne Edwards, 1873), Ile des Pins and Poum (Takeda & Nunomura, 1976); Fiji (Edmondson, 1959); Samoa (Edmondson, 1959); Laysan Island (Rathbun, 1906); Hawaiian Islands; Line Islands - Palmyra and Tabuaeran (Edmondson, 1923, 1959); Clipperton Island (Schmitt, 1939).