Anterior nostril pierced on front side of a flap; processus dentiformis present; lower lip interrupted medially; lateral line incomplete, reaching vertical of dorsal fin; anus about 1-2 eye diameters in front of anal-fin origin; 8.5 branched dorsal-fin rays; 5.5 branched anal-fin rays; caudal fin emarginate, with 8+7 branched rays; axillary pelvic lobe present; body with 6-10 bars, much narrower than interspaces, very irregular in smaller individuals, sometimes dissociated into a lateral blotch and a middorsal saddle; black bar at caudal-fin base incomplete, restricted to lower half of caudal-fin base in several specimens; a black dot at anterior extremity of dorsal-fin base (Ref. 36949).