chrysargyreus, Tetragonopterus Günther [A.] 1864:328 [Catalogue of the fishes in the British Museum v. 5; ref. 1974] Essequibo River, Guyana. Holotype (unique): BMNH 1864.1.21.69. •Valid as Moenkhausia chrysargyrea (Günther 1864) -- (Ortega & Vari 1986:9 [ref. 9708], Géry et al. 1991:57 [ref. 21021], Taphorn 1992:266 [ref. 23654], Planquette et al. 1996:294 [ref. 22818], Lucena & Lucena 1999:235 [ref. 24225], Benine 2002:293 [ref. 26541], Benine in Reis et al. 2003:146 [ref. 27061], Marinho & Langeani 2010:886 [ref. 30927], Bertaco et al. 2011:60 [ref. 31234], Barriga Salazar 2014:108 [ref. 35745] as chysargyrea, Sarmiento et al. 2014:185 [ref. 35004], Petrolli et al. 2016:168 [ref. 34395], Melo et al. 2016:133 [ref. 34701], Azevedo-Santos & Benine 2016:208 [ref. 34837], DoNascimiento et al. 2017:51 [ref. 35633], Meza-Vargas et al. 2021:19 [ref. 39298], Borstein et al. 2022:16 [ref. 39507], Taphorn et al. 2022:17 [ref. 41297], Marinho & Benine 2024:224 [ref. 40817]). Current status: Valid as Moenkhausia chrysargyrea (Günther 1864). Acestrorhamphidae: Stichonodontinae. Distribution: South America: Amazon and Orinoco river basins (Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname and Venezuela). Habitat: freshwater.