Opsarius sajikensis, a new bariliine fish (Cyprinidae: Danioninae) from the Yu River basin of Manipur, Northeastern India

Abstract

Opsarius sajikensis, a new species of bariliine cyprinid fish is described from the Kana river of Yu River basin, Manipur, India. It is distinguished from congeners in having the following combination of characters: eye diameter 6.9-8.5% SL, caudal peduncle length 14.8-17.8% SL, prepelvic length 49.9-51.7% SL, anal-fin length 22.5-23.9% SL, interorbital distance 36.1-39.0% HL, predorsal scales 23-24, lateral line scales 43-45, 11-15 dark blue vertical bars on the sides of body, vent to anal fin origin 23.9-27.9% distance between pelvic and anal fins,23.6-30.6% distance between pelvic and caudal-fins, presence of very short, rudimentary maxillary and rostral barbels. A key to the species of Opsarius and their distributional pattern in the two main river basins of Manipur are provided.