A. Milne Edwards, 1865
Carapace typically pyriform, the hepatic regions not being prominent and the branchial regions markedly swollen. The dorsal surface covered with numerous granules or tubercles of various sizes, of which three large ones are placed in the median line of the gastric region and also three erect ones arranged obliquely along the lateral border of the branchial region, the last of which is largest of all the tubercles and occupies the broadest portion of the carapace. Pseudorostral horns are about one fourth the length of the carapace, parallel with each other in their proximal half but widely divergent from the position where the usual accessory spinule occurs.
Supraocular eave prominent but its anterior and posterior angles not markedly pointed. Close to the postocular cup is an intercalated spine, the sinus between it and the supraocular eave is deep and U-shaped.
There is a stout nipple-shaped tubercle near the middle of the pterygostomial region. The basal antennal article has two tubercles, one at its distal end and the other in the middle of its outer border.
Chelipeds of female are very slender and short, not exceeding the length of the carapace proper. Ambulatory legs are slender and smooth, each segment being unarmed and furnished with a row of curled hairs on the anterior border. (Sakai, 1938: 270)
Type locality: Zanzibar.
Range: Zanzibar (A. Milne Edwards, 1865); Mozambique (Hilgendorf, 1879); Seychelles (Rathbun, 1911); Mauritius (Michel, 1964); Sri Lanka (Alcock, 1895a); Andamans (Alcock, 1895a); Japan - Nanki Shirahama (Sakai, 1938a), Kii Minabe, Kii Sakaihama and Shiono-misaki (Sakai, 1976a); Philippines - Zamboanga (Miers, 1886); Indonesia - Timor and Kepulauan Kai (Griffin & Tranter, 1986a); 15-36 m.