Phalangipus arachnoides   Latreille,  1825 (Crab)
Organism information awaits expert curation
Class: Malacostraca

Second pair of trunk-legs six or more times the length of the carapace. a conspicuous set of spinules arranged in the form of a T on the gastric region. Two series of distant spinules on either branchial region.

Carapace subpyriform, subcircular. Its breadth equal to its length behind the base of the eye stalks. The regions are distinctly delimited, and the surface is uneven and armed with some symmetrically disposed spines and spinules of which the six following are very conspicuously large. The rostrum varies somewhat. It is always short and typically consists of two vertically compressed spines which are fused in rather more than half their extent and have the tips slightly divergent. The chelipeds in the adult male are more than half again as long as the carapace and rostrum. The merus is little enlarged distally and the palm is inflated and distally enlarged. The fingers which are half the length of palm are slightly separated at the base when clenched. The chelipeds in the female are only one-fourth longer than the carapace and rostrum, and are slenderest of all the trunk-legs. The first pair of ambulatory legs are at least six times the length of the carapace and rostrum,rather more than a third of their extent being formed by the dactylus. The body and legs are usually covered with an excessively short fine down. Legs are often banded, sometimes very distinctly with dull red.

Synonym (s)
Egeria arachnoids Latreille, 1825

Common Name (s)
Economic Importance and Threats

Habitat:  Sandy


• Lakshadweep INDIA
• Red Sea

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:2010-11-10

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