Garra ngopi sp. n., a new fish species (Cyprinidae: Labeoninae) from the Brahmaputra River basin, Arunachal Pradesh, North-Eastern India

Garra ngopi sp. n., a new Labeoninae species, is described from the Tinam stream of the Tissa River (district Longding), which is a headwater of the Brahmaputra River basin in Arunachal Pradesh, North-Eastern India. The new species is distinguished from its congeners by the following combination of characters: smooth snout with 7-8 shallow pits forming a pseudo groove structure on anterior most of snout; 4-5 shallow pits on both sides of snout, 2 + 2 shallow pits on rostrum midst of snout; 11-13 shallow pits situated in between nares; dorsal, pectoral and pelvic fins spread with two to four smooth and shallow pits; caudal fin rays spread with numerous shallow pits are very distinct. Head without proboscis; 35-36 lateral line scales; 9-10 predorsal scales; absence of scales on chest and belly. Evidences of genetic analyses (genetic distance, phylogenetic clustering and species delimitation), on the basis of mitochondrial gene (cox1) indicated that the species was distinct from other known congeners.