New Crab Species found in T.N.

Prelims level : Environment Mains level : GS-III Environment & Biodiversity | Conservation, Environmental Pollution & Degradation, Eia
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  • Researchers have discovered a new species of crab in the mangroves of Parangipettai near the Vellar river estuary in the Cuddalore district of Tamil Nadu.



  • The new species of estuarine crab discovered in Tamil Nadu has been named Pseudohelice annamalai as a mark of recognition of the “Annamalai University” which has completed 100 years of service in education and research.
  • This is said to be the first-ever record of the genus, Pseudohelice in the intertidal areas and to date, only two species namely Pseudohelice subquadrata and Pseudohelice latreillii have been confirmed within this genus.
  • The discovered species is found around the Indian subcontinent and the eastern Indian Ocean.
  • Pseudohelice annamalai is marked by dark purple to dark grey colouring, with irregular light brown, yellowish brown, or white patches on the posterior carapace with light brown chelipeds.
  • Pseudohelice annamalai inhabits muddy banks of mangroves and links the distribution gap between the western Indian Ocean and the western Pacific Ocean.
  • The newly discovered species also provides additional evidence of the geographic isolation of the eastern Indian Ocean for some marine organisms.
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