(Adams & White, 1848)
The carapace is depressed as in Tiarinia depressa; the dorsal surface is almost smooth to the naked eye but unevenly tuberculated under the lens. The gastric and cardiac regions are markedly convex, the former being rounded and indistinctly trituberculated. The hepatic regions of our specimen is scarcely tuberculated; the branchial regions are uneven and have three rather distinct tubercles along the antero-lateral borders and a long, acuminate spine at the lateral angle. One intestinal tubercle, and one on either side of the posterior border; these tubercles are erect and furnished with several hairs. The pseudorostral spines are deflexed; the preocular spine is acuminate and predominant in size, the postocular cup is not very broad and its tip subtruncate.
Chelipeds are similar to those of the former species. The ambulatory legs are sensibly compressed; the anterior and posterior borders are thickly fringed with longish hairs and the upper surface with a longitudinal row of curled hairs. The terminal segment of male abdomen very narrow and long, resembling that of Tiarinia spinigera. (Sakai, 1938: 322)
Type locality: Philippines.
Range: Japan - Tosa Okinoshima (Sakai, 1938a), Tosa Bay and Yoron-to, Amami-shoto (Sakai, 1976a); Philippines: New Guinea.