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

Ancistrus minutus is a species of catfish in the family Loricariidae. It is native to South America, where it occurs in tributaries of the Tocantins River upstream of the Serra da Mesa Dam in Goiás, Brazil. The species reaches 5.7 cm (2.2 inches) SL. It is named for its notably small size when compared with many of its congeners.