Actaea calculosa   (H. Milne Edwards,  1834) (Crab)
Organism information awaits expert curation
Class: Malacostraca

Image copyrights: Government of India

Size: Width 10 mm; length 8 mm

Medium sized crab with sub-circular, convex carapace, the lobules are very much distinctly delimited by smooth, wide, shallow grooves. The granules on the carapace and chelipeds are smooth and confluent with each other intimately. Lobulations of carapace are distinct and the lobules 1M; partially divided by 2M; 3M; 1L, 2L, 3L, 5L and 6L, 1P and distinctly separated 2P, all the lobules outlined and are so well distinguishable that there is no chance for confusion or mistake.
Lobules on the antero-lateral sides of carapace are distinct, rounded and four in number. Chelipeds massive, its outer surfaces thickly studded with confluent tubercles and three rows of well marked tubercles present on the lower, outer half of palm. The tubercles on the legs are sharper, like spines. Fingers deep brown; tips white and obtusely pointed, and spooned. A cluster of plumose setae fringed the inner subapical area of male anterior pleopods, outer and lower subapical regions armed with spinules on all sides.

Synonym (s)
Cancer calculosa A. M. Edwards, 1869
Actaea calculosa A. Milne Edwards, 1865
Cancer calculosa H. Milne Edwards, 1834
Euxanthus tuberculosa Miers, 1884

Common Name (s)
Economic Importance and Threats



• Tamil Nadu, Gulf of Mannar INDIA
• Gujarat, Okha Port INDIA
• Karachi PAKISTAN

Literature Source(s)
  • Deb, M (1989) Contribution to the study of Xanthidae: Actaeinae (Decapoda: Crustacea) of India Records of the Zoological Survey of India. Occasional Paper No. 117 ZSI, Calcutta 59 pp Available at - NIO, Goa
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -

Page last updated on:2010-08-17

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