leoni, Ancistrus de Souza [L. S.], Taphorn [D. C.] & Armbruster [J. W.] 2019:20, Figs. 11-12 [Zootaxa 4552; ref. 36504] Río Negro, in rapids about 1 km south (downstream) of the mouth of the Casiquiare, Atabapo District, Amazonas State, Venezuela, 1.987611°, -67.120250°. Holotype: MCNG 56680 [ex MCNG 53811]. Paratypes: AUM, CAS, MCNG. •Valid as Ancistrus leoni de Souza, Taphorn & Armbruster 2019. Current status: Valid as Ancistrus leoni de Souza, Taphorn & Armbruster 2019. Loricariidae: Hypostominae. Distribution: Upper río Negro and río Orinoco, Venezuela, northernmost Brazil and probably tributaries of the río Negro in adjacent regions of Colombia. Habitat: freshwater.