Hermit crabs Calcinus of the world (Anomura: Diogenidae)


Calcinus talismani A. Milne Edwards & Bouvier, 1892

Illustrations. - • Calcinus talismani. Cape Verde Islands.. Copyright P. Wirtz.

References. - Calcinus talismani A. Milne Edwards & Bouvier, 1892: 225 [type locality 'îles du Cap Vert']

Calcinus talismani - A. Milne Edwards & Bouvier, 1900: 173, pl. 23, fig. 15–18 (Cap Vert). - Stebbing, 1914: 278–279 not seen (Cape Verde). - Forest, 1955: 69 (Kassa Is., Los Archipelago, Guinea; see remarks). - Forest, 1961: 221 (Cape Verde: Sao Vincent). - Türkay, 1982: 109 (Cape Verde: Sao Vincent, Sao Nicolau, Sal, Boa Vista, Sao Tiago). - Debelius, 1999: 60 (Cape Verde; color photograph). - Lindey & Hernández, 2000: 3 (Zoea from Cape Verde).

Shield and cephalic appendages. - Ocular scale with a single terminal spine (sometimes 2 spines). Species of normal size, i.e. shield length often greater than 2–3 mm. Anterodorsal plate of branchiostegite unarmed on dorsal margin or with 1–2 spinules subproximally.

Chelipeds (P1). - Upper margin of right chela smooth. Outer face of left palm regularly convex.

Ambulatory legs (P2-P3). - Dorsolateral margins of P3 propodi rounded. Dactyl of P3 distinctly shorter than propodus. Distal pilosity of P3 weak, similar to distal P2. Ventral margin of P3 dactyl with less than 10 spines.

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

Coloration. - Shield pale brown to red brown. Ocular peduncle multicolored with narrow ring close to cornea. Distal antennular peduncle yellow-orange (to be confirmed). Distal antennal peduncle brown, or yellow-orange. Chela uniformly colored, often grading to paler distally. Ambulatory legs (P2 & P3) with ring(s) (see remarks).

Habitat. - Shallow-waters (in depth of about 5 m in Cape Verde Is.).

Geographic distribution. - East Atlantic, Cape Verde Islands and possibly (see remarks) Guinea Conakry (Los archipelago). East Atlantic.

Remarks. - Material examined - 5 males 4.0–5.2 mm, coll. J. Cadenat 18/06/1955, Praia, Sao Tiago Island, Cape Verde (MNHN Pg 819; with other spp. not examined). Affiliated to C. tibicen but different by: a) dorsal margin of P3 propodi rounded (angulous in tibicen); b) 2 red rings distally on ambulatory legs, first ring on distal propodus+proximal dactyl, second ring medially on dactyl (only second ring in tibicen); c) distal ocular peduncle distally blue (narrow white ring in tibicen); d) low granules on left chela (large in tibicen). From color photograph of P. Wirtz (in Debelius, 1998), propodus of ambulatory leg has a narrow white-blue ring proximally, a large median brown ring, a narrow subdistal white-blue ring, a narrow red ring distally (forming a continuous red ring with narrow red ring proximally on dactyl).

This species is know with certainty from Cape Verde only. Forest (1955: 69) has examined a small female from Guinea Conakry (Los Archipelago) that he attributed to C. talismani. However, he pointed out few differences, including absence of coloration and a crest or longitudinal depression on dorsal face of P3 propodus, that indicate that this female could belong to another species.

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.