erythropterus, Tetragonopterus Holmberg [E. L.] 1891:189 [Revista Argentina de Historia Natural (Buenos Aires) v. 1; ref. 2192] Rio de la Plata, Paraná; Buenos Aires, Argentina. Syntypes: whereabouts unknown. •Valid as Astyanax erythropterus (Holmberg 1891) -- (Azpelicueta et al. 2002:1052 [ref. 26511], Almirón et al. 2002:8 [ref. 26720], Buckup in Reis et al. 2003:108 [ref. 27061], López et al. 2003:23 [ref. 27366], Casciotta et al. 2003:332 [ref. 27401], Azpelicueta et al. 2003:11 [ref. 27696], Mirande et al. 2004:220 [ref. 27659], Menni 2004:77 [ref. 28131], Soneira et al. 2010:780 [ref. 31078], Mirande & Koerber 2015:23 [ref. 35117], Terán et al. 2017:7 [ref. 35358]). •Valid as Psalidodon erythropterus (Holmberg 1891) -- (Mirande & Koerber 2020:2 [ref. 37594], Terán et al. 2020:10 [ref. 37440], Koerber et al. 2021:4 [ref. 38894], Koerber et al. 2023:4 [ref. 40355], Loureiro et al. 2023:75 [ref. 40506], Zanata et al. 2024:260 [ref. 40718]). Current status: Valid as Psalidodon erythropterus (Holmberg 1891). Characidae: Stethaprioninae. Distribution: South America: middle and lower río Paraná and Río de la Plata basin (Argentina, Paraguay and Uruguay). Habitat: freshwater.