This species is distinguished from its congeners by the following set of characters: absence of spots or blotches on head and body; lower lips with rounded papillae; elongated odontodes on cheeks reaching the pectoral-fin spine when adpressed to body; space between the eyes not entirely covered by a blotch; parieto supraoccipital moderately elevated not forming an apparent crest; diminute plates with short odontodes on base of pectoral fins and anterior part of urogenital opening; prominent lateral wall of metapterygoid channel with sturdy base, including sinuous edges; adductor palatine crest forming a diminute, almost perceptible salient; upper and lower jaws with <25 teeth; seven saddles along the body; four oblique bars on body behind head, reaching further midventral plate rows series without fading; dark bars crossing membranes of dorsal fin; and yellow stripes of the head obliquely positioned on head, not larger than eye orbit (Ref. 138240).