Stimpson, 1857
Carapace markedly depressed and flattish, the tubercles found on the dorsal surface are also depressed and confluent, never erect as in Tiarinia spinigera, so that only the larger tubercles are perceptible. The branchial margin has about five rather prominent and flat tubercles, distributed along the antero-lateral and postero-lateral borders; at the junction of both borders is another small acuminate tooth. Along the postero-lateral borders, the submarginal surface is deeply channelled; the posterior border is armed with three obtuse teeth, of which the median one is very broad and the lateral ones more prominent.
The pseudorostral spines are less markedly deflexed when compared with those of Tiarinia cornigera; the preocular tooth is also considerably pointed but the postocular cu is broader and subtruncate at tip. The pterygostomial regions and also the lateral surface of the branchial regions are covered with well-marked tubercles.
Chelipeds are like those of T. cornigera; the ambulatory legs are pronouncedly compressed and are fringed with h airs along the anterior and posterior borders. The merus is indistinctly tuberculated along the anterior and posterior borders, these tubercles are more remarkable in the first or first two pairs.
The terminal segment of male abdomen is distinctly shorter than its width. (Sakai, 1938: 321)
Type locality: Amami-Oshima, Japan.
Range: Japan - Amami-Oshima (Stimpson, 1857c), Kawanabe-gun, Kagoshima (Sakai, 1938a), Kagoshima, Amami-Oshima and Yoron-jima (Sakai, 1976a), Mimase and Kawanabe-gun (Muraoka, 1998); Taiwan - Lan-Yü (Lin, 1949).