Tylocarcinus styx   (Herbst,  1803) (Crab)
Organism information awaits expert curation
Taxonomy
Kingdom:Animalia
Phylum:Arthropoda
Class: Malacostraca
Order:Decapoda
Family:Epialtidae

Image copyrights: NIO, Goa

Description
Ambulatory legs short and stout, first pair considerably longest, rather longer than carapace and rostrum, merus and carpus in all nodose on dorsal surface, dactyi strong and claw like.

Carapace subpyriform and covered with rounded tubercles, among which the following are distinct: two in the inter-orbital space; four in a transverse series on the front part of the gastric region, followed by three in triangle; one in the groove between the gastric and cardiac regions, and three in a triangle on the latter region. Besides these there are several on either hepatic region and many on the branchial regions. The rostrum, which is between one-third and one fourth the length of the carapace proper, consists of two divergent spines fused together at the base and slightly incurved towards the tip. The chelipeds in the adult male are equal to the length of carapace. They are hardly stouter than the other legs, except as to the palm, which is short and inflated. In the female the chelipeds are not quite as long as the post orbital portion of the carapace, are slenderer than the other legs, and have the palm slender and the fingers closely apposable throughout. The ambulatory legs are short and stout. The first pair which are considerably the longest.

Seen in live corals of Acropora species and mostly in the crevices of dead corals.


Synonym (s)
Cancer styx Herbst, 1803

Common Name (s)
Economic Importance and Threats

Ecology
Habitat:  Reef Associated, Rocky

Biogeography


• Lakshadweep, Minicoy (Lat: 8.12) (Long: 73.3) INDIA
• Lakshadweep (Lat: 10.5) (Long: 73) INDIA
• Lakshadweep INDIA
• Tamil Nadu, Gulf of Mannar INDIA
• Andaman and Nicobar Islands INDIA
• Red Sea
• Tamil Nadu, Chennai INDIA
• Andaman and Nicobar Islands, South Andaman, Aberdeen Bay INDIA
• Lakshadweep, Minicoy INDIA
• Tamil Nadu INDIA

Literature Source(s)
  • Tikadar, BK; Daniel, A and Subbarao, NV (1986) Sea shore animals of Andaman and Nicobar Islands The Director, ZSI, Kolkatta 188 Available at - ZSI, Pune
  • Sankarankutty, C (1961) On some crabs (Decapoda, Brachyura) from the Laccadive Archipelago Journal of the Marine Biological Association of India Marine Biological Association of India 3(1-2) 120-136 Available at - NIO, RC, Kochi
  • 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
  • Marine Biological Station, Chennai, Tamil Nadu (2003) Checklist of marine fauna of Tamil Nadu Department of Environment, Government of Tamil Nadu Available at - http://tnenvis.nic.in
  • Roy, MKD and Nandi, NC (2005) Brachyuran diversity of coral reef ecosystems in India Proceedings of the National Seminar on Reef Ecosystem Remediation SDMRI Special Research Publication No.9 220-231 Available at - http://www.sdmri.org/reports/proceedings%202005%20-%20sdmri.pdf
  • Deb, M and Rao, GC (1993) A check-list of the brachyuran crabs (Crustacea: Decapoda)of Bay islands Journal Of The Andaman Science Association Andaman Science association, Port Blair 8(1-2) 25-34 Available at - NIO, Goa
  • James, PSBR ; Thomas, PA ; Pillai, CSG and Achari Kumaraswamy, GP (1969) ´╗┐Catalogue of types and of sponges, corals, polychaetes, crabs and echinoderms in the reference collections of the Central Marine Fisheries Research Institute Bulletin of Central Marine Research Institute CMFRI, Cochin 7 1-66 Available at - http://eprints.cmfri.org.in/567/1/Bulletin_7.pdf
  • Sankarankutty, C (1962) On decapoda brachyura from the Andaman and Nicobar islands 3. Families: Calappidae. Leucosiidae, Parthenopidae, Maiidae, and Gecarcinidae Journal of the marine biological association of India. The marine biological association of India 4(1) 151-164 Available at - NIO, Goa
  • 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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