Calcinus hakahau Poupin & Mclaughlin, 1998
Illustrations. - Specimen from Marquesas Island (copyright J. Hoover). J. Hoover photograph. Female holotype, shield length 1.8 mm, Marquesas. Preserved sp. Coloration slightly faded. ocular peduncles, color pattern. Left chela, outer face (Holotype). Left third pereopod, coloration pattern.
References. - Calcinus hakahau Poupin & McLaughlin, 1998 (type locality: Marquesas Islands).
Shield and cephalic appendages. - Ocular scale with several terminal spines (24 spines).
Chelipeds (P1). - Upper margin of right chela tuberculated or spinous. Outer face of left palm regularly convex.
Ambulatory legs (P2-P3). - Dactyl of P3 subequal to propodus or slightly shorter (0.80.9). Distal pilosity of P3 weak, similar to distal P2.
Armament of telson. - Left lobe of telson with several spines disposed on posterior and lateral margins (25 on lateral margin, 27 on posterior margin). Right lobe with several spines (16).
Coloration. - Shield pale brown to red brown. Ocular peduncle multicolored without narrow ring close to cornea. Detailed coloration of ocular peduncle: proximally pink, grading to pale pink or white distally. Distal antennular peduncle white-violet (only on basal segment and distal half of terminal segment; median segment and proximal half of terminal segment, yellow; flagella yellow). Distal antennal peduncle yellow-orange (only terminal segment; basal segments orange-brown; flagellum yellow). Chela uniformly colored, often grading to paler distally (grey to pink). Ambulatory legs (P2 & P3) with ring(s) (white and pink).
Habitat. - Shallow-waters (1855 m).
Geographic distribution. - Only Marquesas Islands, French Polynesia. Indo-West Pacific.
Remarks. - Species affiliated to Calcinus gouti. Presence (C. gouti) or absence (C. hakahau) of a submedian patch or spot on outer face of left chela is the best character to separate them.