(Alcock, 1898)
The carapace is broadly suboval with the ill-defined, rather sparingly granulated and pitted dorsal surface. The frontal, orbital and antero-lateral borders are strongly crested and light-coloured. The crest of the antero-lateral border is divided into four by three closed fissures. The first is only rounded, and the second is nearly equal in size and angulated in the middle. The third is similar to the second, but much larger and bears the angulated part somewhat anteriorly. The last is angulated at the posterior end. The postero-lateral dorsal surface and the posterior border are beaded each with several conical granules. The chelipeds are for their greater parts concealed beneath the carapace, being beautifully sculptured. At the distal end of the merus is a petal-like crest. In the carpus three petaloid granules run along the upper border, and two long curved petaloid crests which confront each other occupy the most part of the outer surface. The palm is also ornamented with some petaloid granules and armed with many conical ones. The fingers are short with the sharp tips, each bearing a blackish cross-band at the base. The ambulatory legs are granular, being fringed with tubular hairs and some spiniform granules. In each carpus of the first three pairs are two long petaloid crests on the upper surface, the anterior one of which is divided into two by the constriction at the distal one third. In the carpus of the last leg that corresponds to the anterior longer crest in the first three pairs is absent. In the propodus are a rounded crest in the middle and a smaller indistinct one at the anterior distal end. (Takeda & Koyama, 1974)
Type locality: Sri Lanka, 62 m.
Range: Kenya - Ile Wasin (Serène, 1984); Madagascar (Serène, 1984); Sri Lanka (Alcock, 1898); Japan - Gobo, Kii Province (Takeda & Koyama, 1974), Kii Nagashima and Kii Minabe (Sakai, 1976a); Philippines - Gulf of Davao (Garth & Kim, 1983), north of Lubang Island (Serène & Vadon, 1981); 15-30 m.