Rhabdonotus pictus   A. Milne-Edwards,  1879 (Crab)
Organism information awaits expert curation
Class: Malacostraca

Carapace nearly as long as broad, perfectly smooth and polished, convex in either direction, glabrous and without any indication of regions. Front prominent and quadrilobate, all the lobes lying in the same plane and with serrated border; inner frontal lobe broader than outer and separated by a deep median cleft, its inner end more prominent than outer and its border oblique and straight; outer frontal lobe conical and small, separated from inner lobe by a concavity and not projecting to the extent of inner lobes. Outer border of outer frontal lobes oblique and forming partly the upper border of orbit. Outer angle of orbit not distinct as a tooth and at a lower level. A minute fissure on the supra-orbital border towards the outer angle. Antero-lateral border together with the postero-lateral border forming a smooth, convex, sharp and entire border. Posterior border of carapace broad and concave. Antennules fold obliquely. Basal antennal joint broad closing the inner gap of orbit, antennal flagellum consisting of few segments. Infra-orbital border slightly concave and entire.
Cheliped sub-equal, smooth to the naked eye but granulated microscopically, segments nearly cylindrical. Inner angle of carpus not prominent. Propodus stout, sub-cylindrical and its upper border longer than dactylus. Fingers toothed and pointed, dactylus closing inside the tip of fixed finger. Legs reducing in size posteriorly, segments smooth and glabrous, dactylus nearly as long as propodus.
Female abdomen consisting of 7 separate segments. Carapace slightly brownish with transverse red lines. A short narrow line between orbits immediately followed by 3 or 4 short transverse lines equally spaced and parallel to each other. An oval or circular ring in the gastro-cardiac region, posterior part of carapace with irregularly disposed lines. Porpodus of cheliped on the outer side with two longitudinal lines.

Synonym (s)
Caphyra archeri Walker, 1887

Common Name (s)
Economic Importance and Threats

Habitat:  Reef Associated, Coastal


• Tamil Nadu, Tuticorin INDIA (Record: 1966) (Depth: 25 mts)
• Tamil Nadu, Gulf of Mannar INDIA
• Tamil Nadu, Tuticorin INDIA
• Tamil Nadu INDIA

Literature Source(s)
  • Tikader, BK (1982) The fauna of India (spiders: Araneae) ZSI, Calcutta 2(part 1-2) 1-536 Available at - NCL, Pune
  • Serene, R and Romimohtarto, K (1963) On some species of Eumedoninae from Indo-Malayan region Marine Research in Indonesia Lembaga Penelitian Laut Djakarta, Indonesia 6 39827 Available at - NIO, Goa
  • Sankarankutty, C (1966) On Decapoda Brachyura from the Gulf of Mannar and Palk Bay Proceedings of the Symposium on Crustacea Marine Biological Association of India, Mandapam Camp Part I 347-362 Available at - http://eprints.cmfri.org.in/2394/1/Article_32.pdf
  • 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 (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
  • 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
  • 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:2011-10-03

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