Takeda & Miyake, 1968
Carapace rather wide, slightly convex anteriorly, without regional indication; dorsal surface, cheliped and ambulatory legs covered with plumose and blush-like hairs; hairs on dorsal surface in small tufts and rows.
Antero-lateral border with three spine-tipped teeth; first two spines curved forward, last directed forward. Subhepatic region with a granulated low prominence. Postero-lateral border only slightly inclined. Ambulatory legs long, meri and carpi each with a terminal spinule. (Takeda, 1998)
Description of holotype: The carapace is rather wide, slightly convex anteriorly and bears no regional indication; the dorsal surface is entirely and rather uniformly covered with small tufts and rows of short plumose hairs; in those tufts near the front and antero-lateral borders, one or two hairs of each tuft are very long and brush-like; behind the front there is a row of two kinds of hairs, viz. one is slightly shorter and plumose, being symmetrically provided with longish secondary hairs at the whole length and the other is much longer and brush-like, being provided with secondary hairs at the distal half; the entire surface is nearly smooth except for the small pits and the minute scant granules near the antero-lateral borders, at and around which the tufts of hairs arise. The front is subtruncated and bears a median small notch, being fringed with longish hairs just near the median notch; the lateral lobules are low and indistinct. The supraorbital border is also fringed with plumose and brush-like hairs, minutely granulated laterally and bears two shallow indistinct notches. The external orbital angle is not produced. The infraorbital border is setose, very minutely granulated and bears a rather deep notch just near the external orbital angle; the inner angle is not so produced and cut obliquely, so that its inner extremity is touched with the proximal portion of the basal antennal segment. The inner angle of the basal antennal segment is just touched with the short ventral prolongation of the front; the antennal flagellum is about twice as long as the major diametre of the orbit and is not provided with secondary hairs.
The antero-lateral border is armed with three spine-tipped teeth; those three teeth are nearly equal; the first two spines at the tips are curved forward, while the hindmost is directed obliquely-forward. The subhepatic region bears a granulated low prominence. The postero-lateral border is longer than the antero-lateral, nearly straight and weakly convergent.
The chelipeds are only slightly unequal, the left one being larger; the entire outer surface of the carpus and palm are thickly covered with brush-like hairs of various length; the inner angle of the carpus is armed with a small spine; the outer surfaces of the carpus and palm are covered with granules, those on the palm being disposed in longitudinal series; the hairs on the palm arise mainly around the granules; the cutting edges of all the fingers are only slightly and irregularly toothed on the whole length; each immovable finger of both chelae bears a deepish longitudinal furrow on the outer surface near the proximal end.
The ambulatory legs are very long and densely furnished with plumose and brush-like hairs of various length; the long hairs on the distal three segments are provided with very short secondary hairs, while the other hairs are provided with longish secondary ones; each merus and carpus of all the ambulatory legs are armed with a small terminal spine. (Takeda & Miyake, 1968a)
Type locality: Maezato, Ishigaki-jima, Okinawa, Japan.
Range: Japan - Ishigaki-jima (Takeda & Miyake, 1968a).