Oreichthys andrewi (Teleostei: Cyprinidae) a new species from Assam, northeastern India

Abstract

Oreichthys cosuatis (Hamilton, 1822) was believed to be a monotypic genus widely distributed throughout India, Myanmar and ranging up to Thailand. Though the genus Oreichthys was known to have an incomplete lateral line, certain studies showed that there are species possessing a complete lateral line, as well as a much higher lateral line scale count. One such species is described here as a new species, Oreichthys andrewi, which can be distinguished from its congeners by the possession of a complete lateral line; 30+1 scales in the longitudinal series; ½ 4 / 1 / 2 ½ scales in the transverse row; 9 predorsal scales and bright yellow pelvic fins.