tenuis, Guyanancistrus Fisch-Muller [S.], Mol [J. H. A.] & Covain [R.] 2018:44, Figs. 15-16, 18d [PLoS ONE v. 13 (no. 1) e0189789; ref. 35723] Small tributary of Rio Mapaoni, upper Jari River basin, Massif du Mitaraka, Para, Brazil, 2˚16'45"N, 54˚32'39"W. Holotype: MZUSP 117148 [ex MNHN 2002-3537]. Paratypes: MHNG, MNHN. •Valid as Guyanancistrus tenuis Fisch-Muller, Mol & Covain 2018. Current status: Valid as Guyanancistrus tenuis Fisch-Muller, Mol & Covain 2018. Loricariidae: Hypostominae. Distribution: Upper Jari River basin, Massif du Mitaraka, Para, Brazil. Habitat: freshwater.