saguazu, Astyanax Casciotta [J. R.], Almirón [A. E.] & Azpelicueta [M. de las M.] 2003:330, Figs. 1-2 [Ichthyological Exploration of Freshwaters v. 14 (no. 4); ref. 27401] Río Uruguay basin, headwater of arroyo Once Vueltas, 27°38'S, 55°12'W, Province Misiones, Argentina. Holotype: MLP 9603. Paratypes: MHNG 2639.47 (9), MLP 9604 (5). Type catalog: Miquelarena & Nadalin 2014:6 [ref. 33466]. •Valid as Astyanax saguazu Casciotta, Almirón & Azpelicueta 2003 -- (Mirande et al. 2004:221 [ref. 27659], Miquelarena & Menni 2005:669 [ref. 28391], Mirande et al. 2006:65 [ref. 28784], Vari & Castro 2007:157 [ref. 29039], Almirón et al. 2010:67 [ref. 30813], Soneira et al. 2010:785 [ref. 31078], Koerber 2011:3 [ref. 31122], Lucena et al. 2013:232 [ref. 32870], Lucena et al. 2013:542 [ref. 32914], Serra et al. 2013:1577 [ref. 33003], Koerber 2014:5 [ref. 33621], Litz & Koerber 2014:14 [ref. 33622], Bertaco & Vigo 2015:270 [ref. 33857], Mirande & Koerber 2015:24 [ref. 35117], Bertaco et al. 2016:412 [ref. 34561], Nión et al. 2016:29 [ref. 35565], Terán et al. 2017:7 [ref. 35358], Lucena et al. 2017:6 [ref. 35607]). •Valid as Andromakhe saguazu (Casciotta, Almirón & Azpelicueta 2003) -- (Koerber et al. 2020:3 [ref. 37480], Mirande & Koerber 2020:2 [ref. 37594], Terán et al. 2020:10 [ref. 37440], Koerber et al. 2021:3 [ref. 38894], Koerber et al. 2023:3 [ref. 40355], Loureiro et al. 2023:72 [ref. 40506]). •Valid as Psalidodon saguazu (Casciotta, Almirón & Azpelicueta 2003) -- (Melo et al. 2024:30 [ref. 41541] in Acestrorhamphinae). Current status: Valid as Psalidodon saguazu (Casciotta, Almirón & Azpelicueta 2003). Acestrorhamphidae: Acestrorhamphinae. Distribution: South America: Uruguay River basin, Province Misiones (Argentina); upper Cuareim River (Uruguay). Habitat: freshwater.