Hermit crabs Calcinus of the world (Anomura: Diogenidae)


Calcinus obscurus Stimpson, 1859

Illustrations. - • Calcinus obscurus Stimpson, 1859. After Holthuis (1954: 21, fig. 5). • Calcinus obscurus Stimpson, 1859. - Chelae and left third P3. After Holthuis (1954: 22, fig. 6).

References. - Calcinus obscurus Stimpson, 1859: 83 (not seen).

Calcinus obscurus - Holthuis, 1954: 20, fig. 5–6 (lagoon near La Libertad, Salvador, central America). - Hendrick & Harvey, 1999: 368 (additional references and distribution: La Libertad, El Salvador, to Ecuador, to ?California). - Boschi, 2000: 71 (Checklist; Panamic province).

Shield and cephalic appendages. - Ocular scale with several terminal spines (3–4 spines on left and 2–3 on right). Species of normal size, i.e. shield length often greater than 2–3 mm.

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. Distal pilosity of P3 weak, similar to distal P2.

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

Coloration. - Ocular peduncle multicolored with narrow ring close to cornea. Chela uniformly colored, often grading to paler distally. Ambulatory legs (P2 & P3) with ring(s) (median ring on dactyls).

Habitat. - Intertidal rocky shores.

Geographic distribution. - La Libertad, El Salvador, to Ecuador, to ?California. East Pacific.

Remarks. - Specimens examined in MNHN collection (J. Poupin): 'Côte Ouest de l'Amérique du Sud', 1 male 9.2 mm, 3 females 5.6–7.0 mm, G. Nobili det. 1905 (MNHN Pg 805); Panama, 1 male 8.6 mm (Pg 802), 1 male 6.0 mm, 1 female 7.0 mm (Pg 803).

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.