A new species of freshwater crab of the genus Travancoriana Bott, 1969, is described from the southern Western Ghats, Eravikulam National Park, Idukki district, Kerala, India. The newly described species, Travancoriana granulata n. sp., is distinct from the other five known species of this genus in some morphological features like parallel lateral margins of the frontal, anteriorly placed broad epigastric cristae, the squarish sixth male abdominal somite, and gonopod structures. A key to the species of Travancoriana is provided. ((c) 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)