Last ray of dorsal and anal fins joined by a low membrane to the base of the caudal fin. Supratemporal branch of lateral line forming an arch. Anterior nostril on the blind side not enlarged, its diameter about half that of the eye; it is situated rather close to the front margin of head, the distance slightly greater than that separating the nostril from the mouth cleft, 1:1-1.4. Length of scales above nasal tube on ocular side much less than the length of the tube. Gill rakers like short knobs on first gill arch on ocular side. Pectoral fin on the ocular side with a black botch over the whole middle and distal part of the fin; blind side whitish (Ref. 32649).