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Minei, 1973

Diagnosis: Postorbital region with one long and three short striae; exopod of third maxilliped failing to reach the proximal third of merus. Propodus of 2nd ambulatory leg with two rows of spinules dorsally. First pleopod stout; ultimate segment slightly curved inwards; penultimate segment 3.3 times as long as ultimate; synovial membrane 1.6 times as long as broad.
Description of holotype: The carapace is quadrangular and practically flat excluding the frontal and orbital regions. The length of the carapace is 0.89 times its greatest breadth and the depth is half the length of the carapace. The postfrontal region bears some tubercles and crenulate striae. The postorbital region bears one long and three short transverse striae. The epibranchial region has some smooth tubercles and crenulate striae. The epibranchial tooth is distinct. The antero-lateral margin of the carapace is roundly crenulate and its posterior margin ends slightly inwards to the dorsum of the carapace. The postero-lateral margin and the subbranchial region bear many granulated striae. The frontal region is 0.33 times the breadth of the carapace, and 0.39 times the distance between the external orbital teeth. The orbital region is narrow, smooth and its margin is crenulate. The subhepatic and suborbital regions are crenulate and have granulated striae. The pterygostomial region is crenulate on the upper part, but smooth on the lower. The exopod of the third maxilliped reaches the proximal fourth of the merus; the merus is as long as broad.
The 6th abdominal segment is 0.55 times as long as broad, and slightly longer than the 7th segment. The 7th segment is 0.62 times as long as broad. The first pleopod is stout; the ultimate segment is slightly curved inwards; the penultimate segment is 3.3 times the length of the ultimate; the synovial membrane is 1.6 times as long as broad.
The chelipeds are similar and subequal, but the right is slightly longer than the left. The carpus id distributed by crenulate striae, and has one large spine and one spinule internally. The upper surface of the palm bears many granulate striae, but is sparsely granulate on the lower. The palm is slightly shorter than broad, and 0.75 times the length of the dactylus. The fingers are not gaping, with a series of many small teeth on the cutting edges. The ambulatory legs are slender, with short hairs. The 2nd ambulatory leg is 1.8 times the breadth of the carapace; the propodus is 3.0 times as long as broad, and bears a longitudinal row of spinules medially. The propodus and the dactylus bear each two rows of spinules dorsally and ventrally. Twelve spinules are present on the ventral margin of dactylus. (Minei, 1973)

Type locality: Fuku-gawa, Kunigami-son, Okinawa-jima, Japan.
Range: Japan - Okinawa-jima (Minei, 1973), Tokashiki-jima (Sakai, 1976a).

Candidiopotamon okinawense