This species is distinguished from its congeners by the following characters: tubercles larger than granules, tubercles of equal size in dorsal row 24-26, ventral row 21-22, upper lateral row up to 20 but the lower one is usually absent; numerous granules, densely set and appearing as small spines covering head, back, flanks and caudal peduncle; a semicircular patch of granules along upper eye margin; chin barbel thick and conical; D1 III-IV; body plain grey (Ref. 59043).