Trapezia cymodoce   (Herbst,  1801) (Crab)
Organism information awaits expert curation
Class: Malacostraca

Image copyrights: Guido T. Poppe & Philippe Poppe

Color (in life): Reddish brown. Some specimen carapace was dark orange brown. Color in spirit yellowish or reddish brown, often very dark or livid on the carapace; distal two-thirds of fingers commonly dark brown.

Distinct spine at the junction of the anterolateral and posterolateral borders of the carapace. Lower border of hand cristate and entire. Frontal border rather undulate, The frontal teeth being not deeply separated. Outer surface of hand of chelipeds covered with very fine downy hairs. A transverse series of red spots traverses the carapace between epibranchial spines.

Diagnosis: Carapace slightly broader than long, suboval. Chelipeds stout, asymmetrical, with smooth surface. Merus with 5-6 rectangular teeth along anterior margin. Carpus with rounded inner-distal angle but inner-proximal angle obtusely triangular; outer surface covered with pubescence. Manus bluntly round on dorsal margin and sharp on ventral margin. Fingers dark-brown at distal quarter, armed with barbs of various sizes on inner margins of major chela with z, rather large triangular barbs at base of minor edge.

Very similar to the species Trapezia lutea. Obligate symbiont, mostly seen in the corals Pocillopora damicornis and very rarely in Acropora corals.

Synonym (s)
Cancer cymodoce Herbst, 1801
Grapsillus dentatus MacLeay, 1838
Trapezia coerulea Ruppell, 1830
Trapezia cymodoce var. ornatus Chen, 1933
Trapezia cymodoce var. typica Ortmann, 1893
Trapezia dentata var. subintegra Dana, 1852
Trapezia dentifrons Latreille, 1828
Trapezia hirtipes Hombron & Jacquinot, 1846

Common Name (s)
Economic Importance and Threats

Habitat:  Reef Associated


• Andaman and Nicobar Islands, Andaman Islands (Lat: 12.5) (Long: 92.75) INDIA
• Lakshadweep, Minicoy (Lat: 8.12) (Long: 73.3) INDIA
• Andaman and Nicobar Islands INDIA
• Palk Bay INDIA
• Lakshadweep INDIA
• Tamil Nadu, Gulf of Mannar INDIA
• Andaman and Nicobar Islands, Neill Island INDIA
• Lakshadweep, Minicoy INDIA
• Lakshadweep Islands (Lat: 8.28) (Long: 72.16) INDIA (Record: 01/1987-03/1987)
• Lakshadweep Islands (Lat: 11.68) (Long: 73.68) INDIA (Record: 01/1987-03/1987)
• 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
  • 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
  • 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
  • Kensley, B (1981) On the Zoogeography of Southern Afrian Decapod Crustacea, with a distributional checklist of the species Smithsonian Contributions to Zoology Smithsonian Institution Press, Washington, D.C. 338 23377 Available at - NIO, RC Kochi
  • Paulson, O (1961) Studies on Crustacea of the Red Sea The Israel Program for Scientific Translations 1-164 Available at - CMFRI, Kochi
  • 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 -
  • Poppe, GT and Poppe, P (1996) Conchology, Inc. Conchology, Inc. Available at -
  • Marine Biological Station, Chennai, Tamil Nadu (2003) Checklist of marine fauna of Tamil Nadu Department of Environment, Government of Tamil Nadu Available at -
  • Sankarankutty, C. (1962) On Decapoda Brachyura from the Andaman and Nicobar Islands : 2. Family Xanthidae Journal of the Marine Biological Association of India The Marine Biological Association of India, Cochin, India 4(1) 121-150 Available at -
  • Rao, GS; Suseelan, C and Kathirvel, M (1989) Crustacean resources of the Lakshadweep islands Marine living resources of the union territory of Lakshadweep: An indicative survey with suggestions for development Bulletin of Central Marine Research Institute CMFRI 43 72-76 Available at -
  • 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:2011-10-11

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