nalseni, Serrasalmus Fernández-Yépez [A.] 1969:unnumbered p. 3 [Evencias No. 23; ref. 21207] Río Uracoa, 9°10'N, 62°27'W, Estado Monagas, Venezuela. Neotype: MBUCV-V-35389. Paratype: MACLPI 68697 (1 of 2 [lost]). Holotype MACLPI 68697 (91.2 mm) is lost. Neotype designated by Machado-Allison et al. 2009:122 [ref. 30953]. •Valid as Serrasalmus nalseni Fernández-Yépez 1969 -- (Machado-Allison 2002:83 [ref. 27640], Jégu in Reis et al. 2003:191 [ref. 27061], Machado-Allison et al. 2009:122 [ref. 30953], DoNascimiento et al. 2017:38 [ref. 35633], Ota et al. 2024:426 [ref. 40817]). Current status: Valid as Serrasalmus nalseni Fernández-Yépez 1969. Serrasalmidae: Serrasalminae. Distribution: South America: Amazon and Orinoco River basins, Colombia and Venezuela. Habitat: freshwater.