GENETIC DIFFERENTIATION AND PHYLOGENETIC RELATIONSHIP OF ELEVEN ASIAN SISORINAE GENERA (SILURIFORMES: SISORIDAE) WITH NEW RECORD OF Pseudolaguvia foveolata

Studies on Sisorinae systematics have been largely restricted to morphological data with few studies on examination of phylogenetic relations. However, no study has been done to evaluate genetic distance of genera under Sisorinae sub-family and detailed phylogenetic relations within it. We used nuclear rag2 gene and mitochondrial COI genes from 64 species to examine genetic differentiation and phylogenetic relationships within eleven Asian Sisorinae genera. Range of interspecies K2P distance for rag2 was 0-0.061% and COI was 0-0.204%. Maximum likelihood (ML) tree revealed ((Erethistini, Sisorini), Bagariini) relationship based on rag2 gene however COI gene showed ((Sisorini, Bagariini), Erethistini) relationship. We recovered three major subclades, Bagariini, Sisorini and Erethistini of subfamily Sisorinae. Further new record of Pseudolaguvia foveolata (Erethistini) has been documented based on thirteen specimen collected from Torsa River, Jaldapara, Alipurduar district, West Bengal, India (26°43'44.66"N and 89°19'32.34"E), thus extending its distribution range in Brahmaputra drainage, India. This report gives additional information on occurrence of the species along with morphometric and meristic data and a comparison with the unique Type specimen (Holotype: UMMZ 244867) of P. foveolata  collected from Teesta River at Teesta barrage (26°45'10"N and 88°34'11"E) West Bengal.