(Takeda & Miyake, 1968)
Small species. Carapace convex in both directions, deeply sculptured into convex regions; each region thickly covered with pearly granules, provided with a blush-like tubular hair; 2M divided into four equal areolets; 3M subdivided into three; 1L not marked, 2L subdivided into two, 3L and 4L distinct, 5L obliquely subdivided into two, 6L separated from 5L by a shallow furrow; postero-lateral region irregularly divided into some areolets. Chelipeds equal; carpus with four or five nodules on outer surface, palm with three on its upper margin. Ambulatory legs rather stout, granulated, bordered with long plumose hairs; each carpus with a longitudinal furrow near its upper margin, a transverse furrow at its subterminal upper portion, forming a prominent lobule. (Takeda, 1998)
Carapace deeply sculptured; those convex areolae widely separated and rather thickly covered with pearly granules, being provided each with a brush-like tubular hair. Areola 2M longitudinally divided, and each areolet again transversely subdivided. Carpus of cheliped with four or five nodules on its outer surface, and palm with three on its upper border. Ambulatory legs rather stout, granulated and bordered with long plumose hairs; each carpus bears a longitudinal furrow near its upper border and a transverse furrow at its subterminal upper portion, forming a prominent lobule at its distal upper portion.
Description of holotype: The carapace is narrow and slightly convex in both directions; the surface is very well divided by wide deep furrows into areolae which are very convex, rather thickly covered with pearly granules and usually provided each with a brush-like hair; those interregional furrows are devoid of granules and hairs; by a deep furrow 2M is longitudinally subdivided into two areolets, of which the inner one is slightly narrower, and each areolet is again transversely subdivided into two by a shallow furrow; 3M is subdivided into three, but the anterior portion is marked only by some granules of good size, the anteriormost of those granules being placed near the anterior border of the antero-inner areolet of 2M; 1L is not at all marked, while 2L is subdivided into two areolets by a shallow transverse furrow; 3L and 4L are distinct; 5L is again obliquely subdivided into two and 6L is separated from 5L by a rather shallow furrow; the postero-lateral region is irregularly divided into some areolets.
The front is slightly produced and cut into two lobes by a rather deep V-shaped median sinus; each lobe is sinuous laterally and deeply separated from the supraorbital angle. The inner part of the supraorbital border is raised and prominent; there are two deep notches which are placed side by side near the external orbital angle. The infraorbital border bears also a notch just below the external orbital angle, and is shallowly excavated in the middle and again produced at its inner angle. The antennal flagellum is fine and less than as long as the major diametre of the orbit.
The antero-lateral border is divided into four convex teeth in addition to the external orbital angle which is also rather prominent; those teeth are subequal or the hindmost is slightly smaller, and thickly covered with small granules like the areolae on the carapace. The postero-lateral border is strongly convergent, of which the anterior half is rounded and the posterior half is concave dorsally. The posterior border is straight and nearly equal to, or only slightly less than the breadth of the front.
The chelipeds are equal. The outer surfaces of the carpus and palm are thickly covered with small granules and provided with sparse fine short hairs; the outer surface of the carpus is rather irregularly divided into four or five lobules which are so convex that they are enough to be the nodules. The palm bears three nodules only on its upper border; the granules on the outer surface are not arranged longitudinally except for those on the distal portion.
The ambulatory legs are comparatively short and stout. Each segment is granulated and bordered with longish plumose hairs. Each carpus bears a longitudinal shallow furrow near the upper border and a short transverse one at the subterminal upper portion; the latter transverse one makes a right angle with the longitudinal one, a lobule thus formed at the upper distal portion being somewhat prominent. The dactylus is much narrower than the preceeding segments.
Colour in formalin is entirely whitish except for the blackish brown fingers of the chelipeds. (Takeda & Miyake, 1968d)
Type locality: Sani, Amami-Oshima, Japan.
Range: Madagascar - Songoritelo (Serène, 1984); Mauritius (Serène, 1984); Japan - Amami-Oshima (Takeda & Miyake, 1968d), Ogasawara-shoto (Takeda & Kurata, 1977).