(Alcock, 1896)
Carapace broadly sub-ovate, the whole surface of the body and appendages is closely covered with vesiculous granules. The branchial, gastro-cardiac and intestinal regions are completely isolated by deep clean cut grooves. The front is thick and broadly produced beyond the eyes and is mesially notched; the posterior border is as broad and thick as the front, projecting beyond the general outline of the carapace.
There are four granulated lobes on either lateral border, two anterior are larger and belong to the antero-lateral border, the others are smaller and belong to the postero-lateral border. The orbits are circular and are completely shut out from the antennulary fossettes, the infraorbital lobe being in close contact with the frontal lobes. The basal antennal segment is fused with the infraorbital lobe, but the antennal flagellum is distinct.
The merus of the chelipeds and ambulatory legs is mostly covered with vesiculous granules, while in the carpus and propodus, the granules are very sharp and spiniform. In the last pair of legs, the merus is also spinulated on the posterior border.
The abdomen of male consists of seven distinct segments; the telson being very long and narrowed. (Sakai, 1937)
Type locality: Ganjam coast, India.
Range: India - Ganjam coast (Alcock, 1896); Japan - east of Kagoshima Prefecture (Yokoya, 1933), Misaki (Sakai, 1937a), Sagami Bay (Sakai, 1965b), Sagami Bay, Kii Nagashima and Tosa Bay (Sakai, 1976a); East China Sea (Takeda & Miyake, 1970a); South China Sea (Dai & Yang, 1991); Vietnam; Thailand; Philippines - north of Lubang (Serène & Vadon, 1981, Chen H., 1989); 23-150 m.