Calcinus morgani   Rahayu & Forest,  1999 (Crab)
Organism information awaits expert curation
Class: Malacostraca

Size: Males with shield length 7.1–8.0 mm; females with shield length 6.0–7.0 mm

Color: Shield gray; ocular peduncles dark brown at proximal end and blue distally, with black rings below corneas. Antennular peduncles dark brownish-green and flagella light yellow. Antennal peduncle and flagella yellowish-orange. Chelipeds reddish-brown with white tips. Ambulatory legs reddish-brown, with light brown propodi and dactyli; dactyls with white tips.

Ocular peduncles long, slender, overreaching both antennal and antennular peduncles. Ocular acicle terminating in a single spine. Antennular peduncle longer than antennal peduncle. Antennal acicle overreaching proximal margin of ultimate peduncular segment terminating in single spine and with 5–7 spines laterally. Fourth antennal segment with a small dorsodistal spine; the outer margin of the first segment with a bifid spine dorsolaterally and the inner margin with a simple spine. Chelipeds unequal, left larger than right. Outer surface of left chelae covered with closely-spaced tubercles becoming prominent on fixed finger and dactyl. Carpus with dorsodistal spine and prominent tubercle on middle proximal end. Right cheliped also with tubercles on upper surface of chela. Ambulatory legs smooth. Meri of second and third pereopods with a spine at inner distal portion. Carpi of both pereopods with strong dorsodistal spine with sometimes a small spine present below the dorsodistal spine on the second pereopod. Dactyls shorter than propodi. Brush of long plumose setae on ventral margins of dactyls and distal part of propodus of third pereopod. Telson with 2–10 spines on left lobe and 1–4 on right lobe.

Synonym (s)
Calcinus areolatus Rahayu & Forest, 1999
(Junior Synonym)

Common Name (s)
Economic Importance and Threats

Habitat:  Coastal


• Kerala, Kollam, Thirumullavaram Beach (Lat: 8.89) (Long: 76.55) INDIA

Literature Source(s)
  • Reshmi, R and Bijukumar, A (2011) New records of hermit crabs, Calcinus morgani Rahayu & Forest, 1999 and Diogenes klaasi Rahayu & Forest, 1995 (Crustacea: Anomura: Diogenidae) from India Journal of Threatened Taxa Wildlife Information Liaison Development Society 3(5) 1771–1774 Available at -
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -

Page last updated on:2011-10-19

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