Hermit crabs Calcinus of the world (Anomura: Diogenidae)


Calcinus isabellae Poupin, 1997

Illustrations. - • Male holotype shield length 4.6 mm, Tuamotu. • Male holotype shield length 4.6 mm, Tuamotu. • ocular peduncles, color pattern. • Aspect of left chela, outer face (Holotype). • Left third pereopod, coloration pattern.

References. - Calcinus isabellae Poupin, 1997: 698 (type locality: Morane atoll, Tuamotu).

Calcinus isabellae - Asakura, 2002: 53 (type specimens and Mariana).

Calcinus imperialis - Wooster, 1984: 130 (Pagan & Guam; Marianas). - Poupin, 1996a: 14 (Society and Tuamotu, French Polynesia) [Not C. imperialis Whitelegge, 1901].

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 with longitudinal depression(s) (a large submedian depression).

Ambulatory legs (P2-P3). - Dactyl of P3 subequal to propodus or slightly shorter (0.6–0.8). Distal pilosity of P3 dense, forming a brush of setae.

Armament of telson. - Left lobe of telson with a single spine. Right lobe with a single spine.

Coloration. - Shield white or cream. Ocular peduncle multicolored without narrow ring close to cornea. Detailed coloration of ocular peduncle: dark narrow ring proximally, basal 2/3 green-olive, distal 1/3 white. Distal antennular peduncle dark green (basal segment orcher; flagella green). Distal antennal peduncle green (basal segment green with yellow tinges at tip of spines; flagellum yellow). Chela with red spot at base of dactyl (background color green olive turning to white distally; carpus of cheliped green-olive, with white spots on tubercles). Ambulatory legs (P2 & P3) with ring(s) (white, black, and red).

Habitat. - Facultative associates of corals (e.g. Pocillopora, Acropora), shallow-waters.

Geographic distribution. - Mariana Islands; French Polynesia (Society and Tuamotu Islands). Indo-West Pacific.

Remarks. - Affiliated to Calcinus imperialis with similar color pattern: red spots at bases of dactyls of chelae and similar rings on ambulatory legs.

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.