Hyastenus gracilirostris [Status Unaccepted]   Miers  1879 (Crab)
Organism information awaits expert curation
Class: Malacostraca

Carapace subpyriform, hardly at all setose, with numerous sharp tubercles an spinules. Specially noticeable are three spinules, longitudinally arranged in the middle line on the gastric region. The rostrum, which does not vary according to sex, consists of two slender divergent spines, the length of which is about one-third that of carapace. The post ocular lobe projects very strongly, and the supra-ocular eave has both the anterior and the posterior angle pronounced. The basal antennal joint has a well-marked tubercle or blunt spine at its antero-external angle. The chelipeds in the male are equal in length to the post-rostral portion of the carapace, and have a few small granules on the merus, carpus and upper edge of the palm. In the female the chelipeds are rather shorter than the post-ocular portion of the carapace, are very slender, and have nearly straight fingers. The ambulatory legs are slender with slender smooth-edged dactyli; the first pair are, as usual much the longest.

This is a very small species. The average size of length of egg-laden female is only 10mm.

Synonym (s)
Hyastenus gracilirostris Miers 1879

Common Name (s)
Economic Importance and Threats

Habitat:  Rocky


• Tamil Nadu, Chennai (Lat: 13.09) (Long: 80.29) INDIA
• Lakshadweep INDIA
• East Coast INDIA
• Tamil Nadu INDIA

Literature Source(s)
  • Alcock, A (1968) Materials for a carcinological fauna of India the Brachyura Oxyrhyncha The Baptist Mission Press 1 1-456 Available at - Pune University, Pune
  • Jeyabaskaran, R; Wafar, S and Wafar, M (2002) CD on Brachyuran Crabs of West Coast, India Available at - http://www.nio.org/Biology/brachyuran/index.html
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at - http://www.marinespecies.org
  • Roy, MKD and Nandi NC (2007) Brachyuran diversity in coastal ecosystems of Tamil Nadu Journal of Environment and Sociobiology Social Environmental and Biological Association, Kolkata, India 4(2) 169-192 Available at - NIO,Goa

Page last updated on:2011-09-30

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