Body pale greenish or grayish overall, with vivid, almost iridescent, horizontal silvery mark in the membrane connecting the opercle to the side of the cranium. Mesethmoid not greatly expanded, its dorsal profile slightly convex, Y-shaped anteriorly. Barbels short, slender; nasal barbel very short, extending posteriorly only to end of posterior naris; maxillary and mental barbels not reaching posteriorly beyond head; maxillary-barbel membrane absent or greatly reduced; maxillary bone inside maxillary barbel very short; outer and inner mental barbels evenly and widely separated. Paired lateral cranial fontanel absent. Branchiostegal membranes free from isthmus. Anal fin with 4-6 simple rays, 7-9 branched rays (typically 5 + 8) (Ref. 40780).