Sakai, 1939
Description of the male holotype: Carapace broader than in Calmania prima and its dorsal surface sparingly scattered with tubercles, each of which is furnished with a few longish hairs; unlike C. prima, no bundle of hairs on either protogastric and epibranchial region. The front bilobate, the median frontal sinus being well defined; each lobe is much less produced beyond the eyes than in C. prima, and its free margin finely tuberculated and thickly fringed with long silky hairs. The upper orbital border is also finely tuberculated but the infraorbital border is entire and the inner tooth obtusely produced.
Antero-lateral borders are marked by three denticulated teeth behind the external orbital angle, the former fringed with a few hairs and the latter sharply angular although it is very small.
Chelipeds are equal and more thickly covered with silky hairs than in C. prima; the wrist is sparingly covered with tubercles; the palm is very high and its upper border crested, but the crest is not so sharp as in Calmania prima, and its dorsal surface is thickly granular and the outer surface has about five longitudinal rows of tubercles. The movable finger is not so strongly deviated inwards as in C. prima, a very wide hiatus between the fingers in the proximal half is thickly furnished with hairs; the distal half of the cutting edges is pigmented and armed with three or four indistinct teeth. Ambulatory legs are very thickly covered with silky hairs, the anterior and posterior borders of each segment are finely tuberculated and thickly fringed with hairs.
The anterior male pleopod may also be utilized in discriminating the new species from C. prima. (T. Sakai, 1939: 549)
Type locality: Shimoda, Japan.
Range: Japan - Shimoda (Sakai, 1939, 1976), Mage-jima, Kagoshima Prefecture (Takeda, 1977b); Philippines - Sisiman Bay, Luzon (Serène & Umali, 1972); rocky beach to 40 m.