Calcinus tropidomanus Lewinsohn, 1981
Illustrations. - Left third pereopod. After Lewinshon, 1981: left second (top) and third (bottom) pereopods.
References. - Calcinus tropidomanus Lewinsohn, 1981: 148 (type locality, Somalia).
Shield and cephalic appendages. - Ocular scale with a single terminal spine.
Chelipeds (P1). - Upper margin of right chela tuberculated or spinous. Outer face of left palm regularly convex (lower margin sharply crested).
Ambulatory legs (P2-P3). - Dorsolateral margins of P3 propodi rounded. Dactyl of P3 subequal to propodus or slightly shorter. Distal pilosity of P3 weak, similar to distal P2 (according to Lewinsohn's drawings). Ventral margin of P3 dactyl with less than 10 spines.
Armament of telson. - Left lobe of telson unarmed. Right lobe unarmed.
Coloration. - Shield white or cream (color from preserved specimens only). Ocular peduncle multicolored with narrow ring close to cornea. Detailed coloration of ocular peduncle: pale-orange to red-orange with white ring close to cornea. Distal antennular peduncle yellow-orange (to whitish; basal segments of the same color). Distal antennal peduncle yellow-orange (to whitish; basal segments similarly colored). Chela uniformly colored, often grading to paler distally (orange turning to paler distally; carpus of cheliped orange, anterior margin and granules white). Ambulatory legs (P2 & P3) with ring(s) and longitudinal bands (meri uniformly yellow; two short red longitudinal stripes on distal outer face of carpi; a red ring on distal propodi; an interrupted red ring on dactyls).
Habitat. - Intertidal rocky shores.
Geographic distribution. - Western Indian Ocean, Somalia. Indo-West Pacific.
Remarks. - Within the genus, this appears to be the single species that do not have a single spine on telson terminal margins. As these spines are sometimes very difficult to observe, it would be interesting to carefully verified it on Lewinshon's specimens.