Coenobita rugosus   H. Milne Edwards,  1837 (Crab)
Organism information awaits expert curation
Class: Malacostraca

Color: various coloration, including reddish-orange, bluish-grey, cream, brown, purple, and a mixture of colours.

There is a dark black patch on the carapace and on the outer face of the left chela. The shield is longer than broader, convex and covered with numerous tubercles. Ocular peduncle elongated and slightly compressed laterally, reaching middle of ultimate segment of antennular peduncles. Ocular acicles, narrow and sharply pointed. Antennal acicles serrate and fused to second peduncular segment. The brush of setae is present on upper margins of both chelae. Upper outer surface of palm of left chela with pronounced stitch mark or oblique laminar tubercles, usually six or seven in numbers, forming what has been called a stridulatory mechanism. The middle of the inner surface of the palm of the left chela has a strong longitudinal ridge below brush of setae. The mesial plane of the merus of the right cheliped is without tuft of setae. Lateral surfaces of propodi and dactyli of left third pereopod flattened and separated from dorsal surface by distinct ridge or crest; ventromesial surfaces of dactyls of left second and third pereopod with longitudinal ridge of closely-set tubercles Ambulatory legs covered with long setae. Coxae of male fifth pereopods forming asymmetrically short sexual tubes.

Synonym (s)
Coenobita subrugosus Neumann, 1878
(Junior synonym)
Cenobita rugosa H. Milne-Edwards, 1837
Caenobita clypeata Owen, 1839
Coenobita clypeatus (Fabricius, 1787)
Coenobita rugosus Ortmann, 1892
Coenobita rugosa Fize & Serene, 1955
Coenobita rugosa var. A. granulata Bouvier, 1890
Coenobita var. B. compressa Bouvier, 1890
Coenobita compressus H. Milne-Edwards, 1837
Coenobita compressus De Man, 1902

Common Name (s)
Economic Importance and Threats

Habitat:  Rocky, Coastal


• Kerala, Thirumullavaram beach (Lat: 8.88) (Long: 76.55) INDIA

Literature Source(s)
  • Reshmi, R and Bijukumar, A (2010) First report of the hermit crabs Coenobita brevimanus and Coenobita rugosus (Crustacea: Decapoda: Anomura) from the Indian coast Marine Biodiversity Records Marine Biological Association of the United Kingdom 3 1-4 Available at -
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -

Page last updated on:2011-01-28

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