hypsauchen, Myletes Müller [J.] & Troschel [F. H.] 1844:97 [Archiv für Naturgeschichte v. 10 (pt 1); ref. 3070] Guyana. Lectotype: ZMH 2865. Paralectotypes: ?BMNH 1971.5.10.60 (1); ZMB 3641 (1), 3642 (1). Type catalog: Wilkens 1977:156 [ref. 22013]. Also appeared in Müller & Troschel 1845:23 [ref. 3071]. Lectotype selected by Géry 1972:190 [ref. 1594]. •Valid as Metynnis hypsauchen (Müller & Troschel 1844) -- (Géry 1972:190 [ref. 1594], Ortega & Vari 1986:8 [ref. 9708], Taphorn 1992:257 [ref. 23654], Zarske & Géry 1999:173 [ref. 23984], Jégu in Reis et al. 2003:184 [ref. 27061], Zarske & Géry 2008:175 [ref. 29917], Pavanelli et al. 2009:141 [ref. 30246], Sarmiento et al. 2014:89, 186 [ref. 35004], Ota et al. 2016:10 [ref. 35002], DoNascimiento et al. 2017:37 [ref. 35633], Silvano et al. 2020:162 [ref. 38133], Meza-Vargas et al. 2021:17 [ref. 39298], Taphorn et al. 2022:28 [ref. 41297], Ota et al. 2024:407 [ref. 40817]). Current status: Valid as Metynnis hypsauchen (Müller & Troschel 1844). Serrasalmidae: Serrasalminae. Distribution: South America: Amazon and Paraguay River basins and northern Guiana Shield rivers (Bolivia, Brazil, Colombia, Guyana, Peru and Venezuela). Habitat: freshwater.