oligolepis, Tetragonopterus Günther [A.] 1864:327 [Catalogue of the fishes in the British Museum v. 5; ref. 1974] Guyana. Holotype (unique): BMNH 1969.12.19.2. •Valid as Moenkhausia oligolepis (Günther 1864) -- (Ovchynnyk 1967:29 [ref. 37559], Ortega & Vari 1986:9 [ref. 9708], Géry et al. 1991:55 [ref. 21021], Planquette et al. 1996:312 [ref. 22818], Britski et al. 1999:34 [ref. 24147], Lima & Toledo-Piza 2001:1061 [ref. 25823], Lasso et al. 2001:96 [ref. 25928], Benine 2002:292 [ref. 26541], Benine in Reis et al. 2003:149 [ref. 27061], Benine et al. 2004:72 [ref. 27502], Géry & Zarske 2004:43 [ref. 28287], Benine et al. 2007:261 [ref. 29279], Benine et al. 2009:161 [ref. 30250], Sousa et al. 2010:262 [ref. 30863], Marinho & Langeani 2010:887 [ref. 30927], Barriga Salazar 2014:108 [ref. 35745], Domingos et al. 2014:7979 [ref. 35446], Pastana & Dagosta 2014:395 [ref. 33384], Sarmiento et al. 2014:185 [ref. 35004], Dagosta et al. 2015:424 [ref. 33998], Azevedo-Santos & Benine 2016:208 [ref. 34837], Guimarães et al. 2016:203 [ref. 36424], Melo et al. 2016:133 [ref. 34701], Ohara & Marinho 2016:[6] 42 [ref. 34383], DoNascimiento et al. 2017:52 [ref. 35633], Reia et al. 2021:11 [ref. 38582], Meza-Vargas et al. 2021:19 [ref. 39298], Borstein et al. 2022:16 [ref. 39507], Koerber et al. 2022:35 [ref. 39235], Taphorn et al. 2022:18 [ref. 41297], Vieira et al. 2023:17 [ref. 40759], Limeira-Filho et al. 2024:5 [ref. 41573], Marinho & Benine 2024:232 [ref. 40817]). •Valid as Bario oligolepis (Günther 1864) -- (Melo et al. 2024:27 [ref. 41541]). Current status: Valid as Bario oligolepis (Günther 1864). Acestrorhamphidae: Thayeriinae. Distribution: South America: Amazon basin (Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname, and Venezuela). Habitat: freshwater.