Minei, 1973
Diagnosis: Carapace flat, with crenulate striae, tubercles and coarsely pitted granules dorsally. First pleopod straight, synovial membrane 5.6 times as long as broad. Second ambulatory leg 1.3 times the breadth of carapace; propodus 1.8 times as long as broad; dactylus stout.
Description of holotype: The length of the carapace is 0.79 times its greatest breadth and the depth is slightly more than half the length. The dorsal surface is practically flat exclusive of the frontal and orbital regions; it is closely covered with tubercles and coarsely petted granules. The postfrontal, postorbital and epibranchial regions are covered with many tubercles and crenulate striae. The antero-lateral margin of the carapace bears distinctly crenulate striae. The postero-lateral margin and the subbranchial region have likewise many crenulate striae. The frontal region bears a group of large and very conspicuous tubercles and its breadth is 0.31 times as broad as the carapace and about half the distance between the external orbital teeth. The exopod of the third maxilliped reaches the proximal two-fifths of the merus; the merus is 0.76 times as long as broad.
The 7th abdominal segment is as long as broad, and 1.4 times the length of the 6th. The 6th segment is half as long as broad. The first pleopod is straight; the penultimate segment is 5.0 times the length of the ultimate; the ultimate segment is straight; the synovial membrane is 5.6 times as long as broad.
In the chelipeds the right is strongly longer than the left. The carpus of the right bears crenulate striae and one large spine and two blunt spinules on the inner portion. The palm bears crenulate striae on the dorsal margin and is smooth on the ventral margin. The fingers are moderately gaped when closed, with a series of 5 to 7 small teeth on each cutting edge. The palm is 1.8 times as long as broad, 0.63 times the length of the dactylus and 0.39 times the length of the chela. The carpus and palm of the left cheliped bear tubercles and crenulate striae. The ambulatory legs are stout, with short striae and coarsely pitted granules. The propodus and the dactylus bear short hairs. The 2nd ambulatory leg is 1.3 times the breadth of the carapace; the propodus is 1.8 times as long as broad; the dactylus is stout. The propodus bears one row of spinules dorsally and two rows of spinules ventrally. The dactylus bears each two rows of spinules dorsally and ventrally; ten spinules arranged in two rows are present ventrally. (Minei, 1973)
Type locality: Taminato, Ohgimi-son, Okinawa-jima, Japan.
Range: Japan - Okinawa-jima (Minei, 1973, Miyake, 1983), Okinawa-jima and Kume-jima (Minei, 1981), Ginowan, Okinawa (Shokita et al., 2000).