jacuhiensis, Tetragonopterus Cope [E. D.] 1894:88, Pl. 6 (fig. 6) [Proceedings of the American Philosophical Society v. 33; ref. 965] Rio Jacuí, Rio Grande do Sul, Brazil. Lectotype: ANSP 21912. Paralectotypes and non-types: (should be 14) ANSP 21606-11 (6), 21683-701 (19) [21702-03 (2) exchanged with Géry], 21913-16 (4). Type catalog: Böhlke 1984:49 [ref. 13621]. Lectotype established by Fowler 1907:435 [ref. 1374]. •Affinities with Astyanax bimaculatus (Linnaeus 1758) and same as Astyanax maculatus (Müller & Troschel 1845) -- (Malabarba 1989:128 [ref. 14217]). •Valid as Astyanax jacuhiensis (Cope 1894) -- (Buckup in Reis et al. 2003:110 [ref. 27061], de Melo & Buckup 2006:49 [ref. 28622], Bertaco & Lucena 2010:19 [ref. 30750], Almirón et al. 2010:67 [ref. 30813], Lucena et al. 2013:232 [ref. 32870], Lucena et al.2013:542 [ref. 32914], Bertaco 2014:498 [ref. 33320], Litz & Koerber 2014:14 [ref. 33622], Bertaco & Vigo 2015:267 [ref. 33857], Petry et al. 2016:301 [ref. 34966], Nión et al. 2016:29 [ref. 35565] as jacuihiensis). •Synonym of Astyanax lacustris (Lütken 1875) -- (Lucena & Soares 2016:103 [ref. 34169], Koerber & Litz 2016:3 [ref. 35098], Koerber et al. 2017:4 [ref. 35083], Koerber et al. 2017:37 [ref. 35267], Koerber et al. 2017:4 [ref. 35632]). Current status: Synonym of Astyanax lacustris (Lütken 1875). Acestrorhamphidae: Acestrorhamphinae. Habitat: freshwater.