oaxacanensis, Tetragonopterus Bocourt [F.] 1868:62 [Annales des Sciences Naturelles, Paris (Zoologie et Paléontologie) (Sér. 5) v. 9; ref. 16971] Oaxaca, Mexico. Description very brief. •Synonym of Astyanax fasciatus (Cuvier 1819) -- (Buckup in Reis et al. 2003:109 [ref. 27061] with question, Mirande & Koerber 2015:2 [ref. 33698]). •Incertae sedis -- (Schmitter-Soto 2017:1334 [ref. 35414], Zanata & Bertaco 2024:110 [ref. 40817]). •Possible synonym of Astyanax aeneus (Günther 1860). Nomen Dubium. Current status: Uncertain as Astyanax aeneus (Günther 1860). Characidae: Stethaprioninae. Habitat: freshwater.