Calcinus tibicen (Herbst, 1791)
Illustrations. - • Male shield length 5.3 mm, La Désirade, Guadeloupe (coloration altered by preservation). Photo Sophie Rozen. • Femal 6.1 mm, La Désirade Guadeloupe (coloration altered by preservation). Photo Sophie Rozen. • Male 6.2 mm, left chela, outer face, La Désirade, Guadeloupe (coloration altered by preservation). Photo Sophie Rozen. • Left P3, outer face, male 6.2 mm, La Désirade, Guadeloupe (coloration altered by preservation). Photo Sophie Rozen. • Left lobe of telson, ventral view, male 6.2 mm, La Désirade, Guadeloupe. Photo Sophie Rozen.
References. - Cancer tibicen Herbst, 1791: 25 (not consulted).
Calcinus tibicen - Campos & Lemaitre, 1994: 147 (Florida, Virgin Islands, Jamaica, Barbados, Antigua, Belize, Colombia, Panamá, Curaçao; see that study for additional references). - Boschi, 2000: 71 (Checklist, Argentinian, Brazilian, Carribean, and Texan provinces).
Shield and cephalic appendages. - Ocular scale with a single terminal spine. 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 slightly carinated. 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. Detailed coloration of ocular peduncle: pale-orange to red-orange with white ring close to cornea. Distal antennular peduncle brown. Distal antennal peduncle white, or brown. Chela uniformly colored, often grading to paler distally. Ambulatory legs (P2 & P3) with ring(s).
Habitat. - Intertidal rocky shores, shallow-waters (lower intertidal and subtital to 33 m).
Geographic distribution. - Florida, Gulf of Mexico, Caribbean to Brazil, including Bermudas. West Atlantic.
Remarks. - Material examined, April 2004 for comparison with C. talismani (see remark under that species), 4 males 4.7–7.0 mm, 1 ov. female 4.2 mm, coll. Mus. Antilles, 3/06/1978, Guadeloupe 'Porte d'enfer' (MNHN unregistered).
