micropterus, Hemigrammus Meek [S. E.] in Eigenmann & Ogle 1907:15 [Proceedings of the United States National Museum v. 33 (no. 1556); ref. 1266] Los Castillos, Venezuela. Holotype (unique): CAS 44438 [ex IU 10802]. •Valid as Hemigrammus micropterus Meek 1907 -- (Taphorn 1992:212 [ref. 23654], Lima & Oyakawa in Reis et al. 2003:132 [ref. 27061], Marinho et al. 2008:58 [ref. 29547], Carvalho et al. 2010:253 [ref. 30862], DoNascimiento et al. 2017:48 [ref. 35633], Urbano-Bonilla et al. 2018:87 [ref. 35773], Albornoz-Garzón et al. 2019:938 [ref. 36872], Taphorn et al. 2022:15 [ref. 41297], Cortés Hernández et al. 2023:455 [ref. 40760]). Current status: Valid as Hemigrammus micropterus Meek 1907. Acestrorhamphidae: Pristellinae. Distribution: South America: Orinoco River basin (Guyana, Venezuela, Colombia). Habitat: freshwater.