Sakai, 1969
This species is peculiar in having a round, deep red spot, surrounded by a white rim, in the centre of the carapace. The carapace is anteriorly broad and the postero-lateral borders convergent backwards. The frontal margin is truncate, about one fourth the greatest width of the carapace there is no median notch. The anterior end of the orbital eave has a small tooth, which is separated from the edge of the front by an indistinct fissure.
The antero-lateral borders are markedly arched, somewhat cristate and cut into three lobes.
The chelipeds are heavy and symmetrical; the merus is rather short and its upper border obscurely ridged, with a subterminal tooth. The carpus is thick, as long as the merus, and has a sharp spiniform process near the middle of the inner border. The propodus is also very thick, the fingers are not pigmented, the prehensile edges are armed uniformly with small sharp teeth. The anterior three pairs of ambulatory legs are subequal in length and thickness. The last pair is a little shorter and the carpus distally broad, the propodus moderately broad and flattened and the dactylus somewhat lanceolate in form. The propodus and dactylus are haired along both margins.
The abdomen of the male is slender, the 4th to 7th terga being narrow, and the general outline resembles that of the genus Eucrate. The anterior male pleopod is very slender and its distal portion armed with a hook at the tip, and four tiny spinules on the outer margin. The posterior pleopod is very short and its distal portion slanting. (Sakai, 1976)
Type locality: Mimase, Tosa Bay, Japan.
Range: Japan - Tosa Bay (Sakai, 1969, 1976); Philippines - north of Lubang Island (Serène & Vadon, 1981).