amazonum, Anacyrtus (Cynopotamus) Günther [A.] 1868:481 [Annals and Magazine of Natural History (Series 4) v. 1 (no. 6) (art. 56); ref. 1992] Xeberos, tributary of Río Huallaga, Amazon system, Dept. Loreto, Peru. Syntypes: BMNH 1867.6.13.69-70 (2). Also published in Günther (Sept.) 1868:246 [ref. 5756]. The correct spelling of this species is amazonum, a noun that does not decline (see note under Curimatus amazonum). •Valid as Cynopotamus amazonus (Günther 1868) -- (Menezes 1976:28 [ref. 7073], Ortega & Vari 1986:8 [ref. 9708], Menezes 1987:6 [ref. 8072], Britski et al. 1999:52 [ref. 24147], Lucena & Menezes in Reis et al. 2003:202 [ref. 27061], Menezes 2007:60 [ref. 29297], Barriga Salazar 2014:109 [ref. 35745], Sarmiento et al. 2014:184 [ref. 35004], DoNascimiento et al. 2017:47 [ref. 35633], Meza-Vargas et al. 2021:18 [ref. 39298]). Current status: Valid as Cynopotamus amazonum (Günther 1868). Characidae: Characinae. Distribution: South America: Amazon River basin (Brazil, Ecuador, Colombia, Bolivia and Peru). Habitat: freshwater.