Uca vocans   (Linnaeus,  1758) (Crab)
Organism information awaits expert curation
Class: Malacostraca

Outer margins of external orbital angles oblique and their tips projecting antero-externally. Prehensile edge of immovable finger simply blade like or marked with deep sinusus or prominent teeth.

Length of the carapace about two-thirds of the greatest breadth, which is at the claw like anterolateral angles. Carapace little convex, all its regions very well defined, the posterior border of its dorsum in the adult male is half its greatest breadth and the true lateral borders are moderately convergent posteriorly. Orbits not very oblique nor very sinuous: the lower border, which is nearly straight, is elegantly crenulate throughout. In the large cheliped of the adult male the upper border of the arm is prominent and the inner border ends in a sharp tooth, independent of the terminal constricted off lobule. The large hand has a curious twist; its palm is compressed and has the upper and lower margins well defined, the outer surface covered with large granules, and the two granular crests on its inner surface fairly prominent; its fingers are broad thin and laminar. The dactylus, which may be four times as long as the upper border of the palm. The merus of the last pair of legs are not at all foliaceous.

Synonym (s)
Cancer vocans Linnaeus, 1785

Common Name (s)
Economic Importance and Threats

Habitat:  Estuarine, Coastal


• West Coast INDIA
• Andaman and Nicobar Islands INDIA
• Tamil Nadu, Pulicat Lake (Lat: 13.41) (Long: 80.05) INDIA
• Tamil Nadu, Pulicat Lake (Lat: 13.91) (Long: 80.31) INDIA
• Tamil Nadu INDIA
• West Bengal (Lat: 21.16) (Long: 85.83) INDIA
• West Bengal (Lat: 21.63) (Long: 89.83) INDIA

Literature Source(s)
  • Roy, MKD and Das, AK (2000) Taxonomy, ecobiology and distribution pattern of the brachyuran crabs of mangrove ecosystem in the Andaman Islands Occasional paper no 185 Records of the Zoological Survey of India ZSI, Calcutta 1-211 Available at - NCL, Pune
  • (1998) Mangrove invertebrates view Zoos' Print Journal Zoo Outreach Organisation, Coimbatore 14(2) 27-29 Available at - NCL, Pune
  • Takeda, S; Poovachiranon, S and Murai, M (2004) Adaptations for feeding on rock surfaces and sandy sediment by the fiddler crabs (Brachyura: Ocypodidae) Uca tetragonon (Herbst, 1790) and Uca vocans (Linnaeus, 1758) Hydrobiologia 528 Available at - Zoological Records
  • Geiger, DL and Jansen, P (2004) New species of Australian Scissurellidae (Mollusca: Gastropoda: Vetigastropoda) with remarks on Australian and Indo-Malayan species Zootaxa 714 Available at - Zoological Records
  • Lim Shirley, SL; Lee, PS and Diong, CH (2005) Influence of biotope characteristics on the distribution of Uca annulipes (H. Milne Edwards, 1837) and U. vocans (Linnaeus, 1758) (Crustacea: Brachyura: Ocypodidae) on Pulau Hantu Besar, Singapore The Raffles Bulletin of Zoology 53 (1) 111-114 Available at - Zoological Records
  • 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
  • Ecology and Biodiversity Available at - http://www0.hku.hk/ecology/
  • Roy, MKD and Nandi, NC (2008) Brachyuran biodiversity of some selected brackishwater lakes of India Proceedings of Taal2007: The 12th World Lake Conference 496-499 Available at - wldb.ilec.or.jp/data/ilec/wlc12/C-%20Biodiversity/C-20.pdf
  • 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
  • Roy, MKD and Nandi, NC (2008) Checklist and distribution of Brachyuran crabs of West Bengal, India Journal of Environment and Sociobiology Social Environmental and Biological Association, Kolkata, India 5(2) 191-214 Available at - NIO,Goa

Page last updated on:2011-10-17

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