schomburgkii, Tetragonopterus Jardine [W.] in Schomburgk 1841:243, Pl. 22 [The Natural history of fishes of Guiana; ref. 18707] Rio Negro, Brazil. No types known. •Valid as Myleus schomburgkii (Jardine 1841) -- (Jégu in Reis et al. 2003:186 [ref. 27061] with authors as Jardine & Schomburgk). •Valid as Myloplus schomburgkii (Jardine 1841) -- (Andrade et al. 2016:154 [ref. 34307], Andrade et al. 2016:579 [ref. 34960], DoNascimiento et al. 2017:37 [ref. 35633], Andrade et al. 2018:121 [ref. 35868], Silvano et al. 2020:176 [ref. 38133], Meza-Vargas et al. 2021:17 [ref. 39298], Ota et al. 2024:415 [ref. 40817]). Current status: Valid as Myloplus schomburgkii (Jardine 1841). Serrasalmidae: Myleinae. Distribution: South America: middle and lower Amazon River basin, Xingu River, Nanay River, upper Orinoco River basin (Brazil, Colombia, Peru, ?Suriname, and Venezuela). Habitat: freshwater.