Ancistrus minutus Fisch-Muller, Mazzoni & Weber 2001

Small, wide, and very depressed body; short dorsal fin (3.9-4.6 times in SL); wide mouth; a small area of supraoccipital plate often depressed, slightly granular or without odontodes; exposed part of nuchal plate minute or totally covered by skin; dorsal and fins brownish with numerous small whitish spots, lips and belly yellowish, totally or mostly unpigmented. Dermal plates along dorsal-fin base 7-8. Short interdorsal distance, 5.5-6 times in SL.

Dorsal spines (total): 1; Dorsal soft rays (total): 6 - 7; Analspines: 1; Analsoft rays: 4; Vertebrae: 28 - 29