Pachygrapsus propinquus   De Man,  1908 (Crab)
Organism information awaits expert curation
Class: Malacostraca

Subquadrilateral, convex crab, much broader than long; lateral sides without teeth and convergent posteriorly. Front more than half of width of carapace, slightly deflexed, free edge little concave. Regions of carapace faintly outlined. Anterior part of carapace, finely tubercular and these tubercles forms transverse granular ridges posteriorly.
Chelipeds slightly unequal in adult, identical; inner edge of arm with 3-4 blunt tubercles at the base and appear as dentate crest distally. Upper outer surfaces of chelipeds and merii of legs reticulate with transverse ridges. Merii very broad, the spines at lower distal edge of merii varies from 2-4 in number. Anterior edges of carpus and propodus thickly fringed with hairs, dactylus short, claw like and spiny.
Presence of transverse granular hairy ridges on the carapace differentiate the species from its nearest allies.

Synonym (s)
Pachygrapsus propinquus de Man, 1908
Pachygrapsus propinquus Kemp, 1915
Panchygrapsus propinquus Tesch, 1918

Common Name (s)
Economic Importance and Threats

Habitat:  Estuarine


• West Bengal, Gangetic Delta (Lat: 7.21) (Long: 93.78) INDIA
• Orissa, Chilika Lake INDIA (Record: 03/1914)
• West Bengal, Port Canning INDIA
• West Bengal, Gangetic Delta INDIA
• Tamil Nadu, Ennore Backwaters INDIA
• West Bengal, Kakdwip INDIA (Record: 09/03/1985)
• Orissa INDIA
• Orissa, Chilika Lake (Lat: 19.46) (Long: 85.1) INDIA
• Orissa, Chilika Lake (Lat: 19.9) (Long: 85.58) INDIA

Literature Source(s)
  • DEB, M (1995) Crustacea: Brachyura Wetland ecosystem series 1: Fauna of Chilka Lake ZSI, Calcutta 345-366 Available at - NIO, Goa
  • Society for the Management of European Biodiversity Data (2009) World Register of Marine Species (WoRMS) Available at -
  • Ghosh, SK (1995) Crustacea: Decapoda: Grapsidae Estuarine ecosystem series, Part 2: Hugli Matla Estuary ZSI, Calcutta 229-248 Available at - NIO, Goa
  • 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 -

Page last updated on:2011-09-22

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