Diagnosis. Microrasbora is diagnosed by the following characters, apparently unique to the genus: lower jaw with broad dorsal flange on the anterior dentary not tapering anteriorly and joining at the symphysis (the well developed symphysial process is almost completely hidden behind this 'cutting edge'); melanophore colour pattern strongly reduced to a faint, hardly defined lateral stripe consisting of the interaxial stripe surrounded with scattered melanophores (in addition, large specimens often exhibit a weak reticulated pattern dorsally)