This species is distinguished from its congeners by the following characters: branch of the temporal sensory canal at sphenotic, this gives rise to the supraorbital canal, with two pores; upper tooth plate of branchial arch with three series of teeth; area at the corner of the mouth, ventral to the maxillary barbel, has a small fleshy flap; caudal-fin base with 2 moderate-sized dark-brown or black blotches on, one on its lateral portion and another one on its dorsal portion, blotches variably diffuse and/or fused with each other; no dark-brown or black stripe transversally crossing the orbit; with a longitudinal dark-brown or black stripe on the postdorsal region of flank midline, variably fused with the lateral peduncular blotch, and some specimens with slender, longitudinally elongated, dark-brown or black blotch on flank midline, forming a dash-like marking, stripe or dash-like blotch diffuse in some specimens; the region around dorsal-fin origin generally lacking a dark brown or black blotch, or displaying diffuse blotch (Ref. 124435).