(Takeda & Miyake, 1969)
Small species. Carapace provided with scattered tufts of wavy plumose hairs, rather well sculptured on anterior and antero-lateral regions, roughened with granules; Antero-lateral border with a granulated ridge and following three teeth; each tooth tipped with a spinule and some accessory granules. Subhepatic region bears some granules of good size. Chelipeds subequal. Merus armed with subterminal spine-tipped teeth on upper border; carpus very roughened by sharp granules of various sizes; palm thickly spaced with granules on entire outer surface; granules on upper border prominent, making a slight nodular appearance. Ambulatory legs comparatively slender, bordered with rather sparse fine plumose hairs; merus with four or five spinules on upper border; carpus with several subacute granules of good size on upper border, proximal and subdistal ones prominent with expanded bases, giving slight appearance of two humps; propodus also armed with some granules. (Takeda, 1998)
Diagnosis: Carapace provided with scattered tufts of wavy plumose hairs, rather well sculptured and roughened by granules. Antero-lateral border with granulated ridge and following three teeth; each tooth tipped with a spinule and bears some accessory granules. Outer surface of palm of cheliped thickly spaced with granules, those on upper border being prominent and making a nodular appearance. Merus of ambulatory leg with some spinules on upper border; carpus with several spinules in two or three rows, and propodus with some in two rows.
Description of holotype: The carapace is slightly convex and rather well sculptured on the anterior and antero-lateral regions; the areolae are roughened by sharp granules of good size which become larger and sharper near the antero-lateral borders; otherwise the surface is provided with several scattered tufts of somewhat wavy, silky plumose hairs which are symmetrically disposed, viz. behind the front, on the supraorbital border, eyestalk, protogastric and branchial regions, and at each end of gastro-cardiac suture. The front is rather produced and cut into two truncated oblique lobes by a median wide sinus; each lobe is bordered with minute granules and bears a granule of good size at its lateral angle, being shallowly but distinctly separated from the supraorbital angle; the supraorbital border bears two depressions and is bordered with granules, of which three are more prominent than the others, viz. one at the inner supraorbital angle, and the other two in the middle. The infraorbital border is also granulated, bears a deep incision near the external orbital angle, and is deeply excavated near the prominent acute inner angle. The basal antennal segment fails quite to reach the ventral prolongation of the front; the antennal flagellum is about twice as long as the major diametre of the orbit and provided with very short, scant secondary hairs.
The antero-lateral border is armed with three teeth excluding the external orbital angle and a granulated short ridge next to the external orbital angle; the granulated ridge is slightly produced and fused with the less prominent external orbital angle; the following three teeth are tipped each with a spiniform granule and bears some accessory granules on their slopes, the hindmost being the smallest of the series. The subhepatic region bears some granules of good size. The postero-lateral border is nearly straight and moderately convergent.
The chelipeds are subequal. The merus is armed with subterminal and terminal spine-tipped teeth on the upper border. The carpus is very roughened by sharp granules of various size. The palm is thickly spaced with granules of good size on the entire outer surface, those granules being not disposed to the linear arrangements; those granules on the upper border are prominent and give the segment a slight nodular appearance; otherwise the palm is provided with rather sparse, longish fine plumose hairs; those granules and hairs are extended on more than half the fingers.
The ambulatory legs are comparatively slender and bordered with rather sparse fine plumose hairs. Each merus is armed with four or five spinules on the upper border, one of which is as a terminal one. Each carpus is armed with several subacute granules of good size on the upper border, those being beaded somewhat to two or three rows; two of those granules on the carpus, the proximal and subdistal ones, are prominent and bears expanded bases, giving the slight appearance of two humps. Each propodus is also armed with some granules like the carpus on the upper border in two rows, but bears no terminal one. (Takeda & Miyake, 1969c)
Type locality: Omonawa, Tokuno-shima, Amami-shoto, Japan.
Range: Japan - Amami-shoto (Takeda & Miyake, 1969c), Tanegashima (Takeda, 1976b).