australis, Hoplias Oyakawa [O. T.] & Mattox [G. M. T.] 2009:119, Fig. 2 [Neotropical Ichthyology v. 7 (no. 2); ref. 30225] Rio das Antas, rio do Ouro drainage, on Formosa do Sul-Irati road, Formosa do Sul, 26°38'55"S, 52°48'05"W, Uruguay River basin, Santa Catarina State, Brazil. Holotype: MCP 40175. Paratypes: many at ANSP [ex MCP, 1 + 1], MCP, MZUSP, and UFRGS. •Valid as Hoplias australis Oyakawa & Mattox 2009 -- (Blanco et al. 2010:361 [ref. 30964], Koerber 2011:3 [ref. 31122], Mattox et al. 2014:343 [ref. 33381], Koerber 2014:2 [ref. 33621], Litz & Koerber 2014:9 [ref. 33622], Mirande & Koerber 2015:14 [ref. 35117], Bertaco et al. 2016:415 [ref. 34561], Rosso et al. 2016:206 [ref. 34785], Nión et al. 2016:29 [ref. 35565], Rosso et al. 2018:249 [ref. 36203], Guimarães et al. 2021:16 [ref. 38947], Loureiro et al. 2023:34 [ref. 40506]). Current status: Valid as Hoplias australis Oyakawa & Mattox 2009. Erythrinidae. Distribution: South America: Uruguay River basin (Argentina, Brazil and Uruguay). Habitat: freshwater.