Achaeus spinosus   Miers,  1879 (Crab)
Organism information awaits expert curation
Class: Malacostraca

Image copyrights: NIO, Goa

Carapace with one gastric, a pair of cardiac and also two branchial tubercles. Last two pairs of ambulatory legs have the dactylus strongly falcated.

Carapace triangular, narrowed behind the eyes, and armed with six spines above, namely; one on the gastric, one bilobed, on the cardiac, and two on each branchial region. There are also some spines or sharp tubercles on the hepatic and branchial regions. The rostrum is small and bilobed. The eye-stalks are robust, and have a strong tubercle near the middle of the anterior surface. Chelipeds in the male robust, the arm and wrist granular above, the palm swollen, with about spinules on the upper margin and a few granules on the lower margin neat its base. Fingers in the male, acute with a wide hiatus at base when closed, both with a strong tooth on their opposed margins near the base, and with the outer margins carinate. In the female the chelipeds differ only in being much less robust and in having the fingers much more closely apposable and toothless. Ambulatory legs long and slender; the dactylus of the last pair strongly falcate.

Last two pairs of legs in some specimen have strongly curved end joints.

Synonym (s)
Achaeus spinosus Miers, 1879

Common Name (s)
Economic Importance and Threats

Habitat:  Rocky


• Lakshadweep INDIA

Literature Source(s)
  • Jeyabaskaran, R; Wafar, S and Wafar, M (2002) CD on Brachyuran Crabs of West Coast, India Available at -
  • 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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