laticeps, Tetragonopterus Cope [E. D.] 1894:89, Pl. 6 (fig. 7) [Proceedings of the American Philosophical Society v. 33; ref. 965] Rio Grande do Sul, Brazil. Holotype: ANSP 21852. Paratypes: ANSP 21853-63 (11, missing), 21743-46 (4) Géry coll. [ex ANSP 21747] (1). Type catalog: Böhlke 1984:49 [ref. 13621] as holotype and paratypes. Lectotype selected by Fowler 1906:348 [ref. 1373]. •Synonym of Astyanax scabripinnis (Jenyns 1842), but a valid subspecies laticeps (Cope 1894) -- (Malabarba 1989:130 [ref. 14217], Triques et al. 2003:149 [ref. 27248], Nión et al. 2016:29 [ref. 35565] as scinabripinnis). •Valid as 'Astyanax' laticeps (Cope 1894) -- (Reis et al. 2020:458 [ref. 38364]). •Valid as Astyanax laticeps (Cope 1894) -- (Bertaco & Malabarba 2001:231 [ref. 25645], Azpelicueta et al. 2002:1053 [ref. 26511], Almirón et al. 2002:8 [ref. 26720], Casciotta et al. 2003:333 [ref. 27401], Bertaco & Lucena 2006:58 [ref. 28628], de Melo & Buckup 2006:50 [ref. 28622], Azpelicueta & Loureiro 2009:3 [ref. 30196], Bertaco & Lucena 2010:12 [ref. 30750], Almirón et al. 2010:67 [ref. 30813], Bertaco et al. 2010:267 [ref. 30864], Tagliacollo et al. 2011:41 [ref. 31138], Lucena et al. 2013:231 [ref. 32870], Lucena et al. 2013:542 [ref. 32914], Bertaco 2014:498 [ref. 33320], Ingenito & Duboc 2014:289 [ref. 33374], Litz & Koerber 2014:14 [ref. 33622], Bertaco & Vigo 2015:270 [ref. 33857], Bertaco et al. 2016:412 [ref. 34561], Nión et al. 2016:29 [ref. 35565], da Graça et al. 2017:13 [ref. 35556], Lucena et al. 2017:6 [ref. 35607], Salgado 2021:10 [ref. 38719], Loureiro et al. 2023:75 [ref. 40506] as''Astyanax' laticeps). •Valid as Psalidodon -- (Melo et al. 2024:30 [ref. 41541] in Acestrorhamphinae). Current status: Valid as Psalidodon laticeps (Cope 1894). Acestrorhamphidae: Acestrorhamphinae. Distribution: South America: southeastern Brazil and Uruguay. Habitat: freshwater.