stenohalinus, Astyanax Messner [E.] 1962:4 [Boletin de la Asociacion Latino Americana de Ictiologos y Herpetologos v. 2 (no. 1); ref. 23528] Laguna Mazangano (32°11'S, 54°65'W), Río Negro basin, Departamento Cerro Largo, Uruguay. Syntypes: MHNM CI 845 (2), 1066 (1), 1186 (1), 1646 (2). Type catalog: Olazarri et al. 1970:3 [ref. 23527]; see also Malabarba et al. 2004:99 [ref. 27836], Loureiro et al. 2016:412 [ref. 35150]. Not treated in Buckup in Reis et al. 2003:112 [ref. 27061], added in Corrigenda (2005). Almirón et al. 2010:61 [ref. 30813] list MHNM 582-2 as the holotype, 582-1 as a paratype; others not found. •Valid as Astyanax stenohalinus Messner 1962 -- (Casciotta & Almirón 2004:15 [ref. 27985], Almirón et al. 2010:60 [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], 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]). •Valid as Andromakhe stenohalina (Messner 1962) -- (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]). Current status: Valid as Andromakhe stenohalina (Messner 1962). Acestrorhamphidae: Acestrorhamphinae. Distribution: South America: Uruguay and Argentina. Habitat: freshwater.