Hermit crabs Calcinus of the world (Anomura: Diogenidae)


Calcinus sirius Morgan, 1991

Illustrations. - • Ocular peduncles, color pattern. After Morgan, 1991. • Left third pereopod, color pattern. After Morgan, 1991. • Calcinus aff. sirius, ov. female 5.5 mm, Rapa Island, 100 m (MNHN Pg 6395). After Poupin & Lemaitre (2003, fig. 1d). • Calcinus aff. sirius, ov. female (MNHN Pg 6395): a, distal part of propodus, and dactyl of left P2; b, left P2; c, left P3. After Poupin & Lemaitre (2003, fig. 5). • Calcinus aff. sirius, ov. female (MNHN Pg 6395), left chela. After Poupin & Lemaitre (2003, fig. 5b).

References. - Calcinus sirius Morgan, 1991: 899 (type locality, Norfolk & Lord Howe Islands, Middleton & Elizabeth Reefs, eastern Australia).

Calcinus sirius - Asakura, 2002: 30 (paratypes for comparison with C. anani).

Calcinus aff. sirius - Poupin & Lemaitre, 2003: 17 (Marotiri Is., south of French Polynesia; 100 m).

Shield and cephalic appendages. - Ocular scale with a single terminal spine (rarely with weak second spinule).

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. Distal pilosity of P3 more prononced than on distal P2, but not forming a dense 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 (coloration only from preserved specimens). Ocular peduncle multicolored without narrow ring close to cornea. Detailed coloration of ocular peduncle: proximally deep brown grading to paler distally. Distal antennular peduncle brown (cream dorsally and ventrally; penultimate segment median brown; flagella pale brown). Distal antennal peduncle brown (with spines cream; flagellum pale brown). Chela uniformly colored, often grading to paler distally (cream with minute scattered orange dots; posterior lateral face and dorsal margin of palm tinged with brown; carpus of cheliped dark brown, with spines and tubercles white or cream). Ambulatory legs (P2 & P3) without ring(s) or spot(s) (medium brown with tip of dactyls cream; distal propodi somewhat paler brown).

Habitat. - Shallow-waters (2–22 m).

Geographic distribution. - Eastern Australia only: Norfolk & Lord Howe Islands, Middleton & Elizabeth Reefs. Possibly south of French Polynesia (C. aff. sirius in Poupin & Lemaitre, 2003: 17, Marotiri Is. 100 m). Indo-West Pacific.

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.