Hermit crabs Calcinus of the world (Anomura: Diogenidae)


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 (2–4 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 (0.8–0.9). 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 (2–5 on lateral margin, 2–7 on posterior margin). Right lobe with several spines (1–6).

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 (18–55 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.

Cite this publication as: J. Poupin (2003, Internet). - Hermit crabs Calcinus of the world (Anomura, Diogenidae). Descriptions, Illustrations, Identification, and Information Retrieval, using the DELTA format.