gauderio, Brachyhypopomus Giora [J.] & Malabarba [L. R.] 2009:62, Figs. 1-3 [Zootaxa No. 2093; ref. 30168] Channel connecting Lagoa do Casamento and Lagoa dos Gateados (30°28'S, 50°40'W), Palmares do Sul, Rio Grande do Sul State, southern Brazil. Holotype: MP 43280. Paratypes: MCP, MNRJ, MZUSP, UFRGS, ?ZVC. Plus non-type material. Type catalog: Loureiro et al. 2016:414 [ref. 35150], Ferraris et al. 2017:[23] [ref. 35236]. •Valid as Brachyhypopomus gauderio Giora & Malabarba 2009 -- (Almirón et al. 2010:572 [ref. 31124], Correa et al. 2011:19 [ref. 40074], Koerber 2011:6 [ref. 31122], Sullivan et al. 2013:3 [ref. 32879], Koerber 2014:11 [ref. 33621], Litz & Koerber 2014:28 [ref. 33622], Mirande & Koerber 2015:48 [ref. 35117], Bertaco et al. 2016:422 [ref. 34561], Crampton et al. 2016:54 [ref. 34832], Nión et al. 2016:34 [ref. 35565] as Brachypopomus, Crampton et al. 2017:721 [ref. 35114], Ferraris et al. 2017:[23] [ref. 35236], Koerber et al. 2017:69 [ref. 35267], Reis et al. 2020:463 [ref. 38364], Dutra et al. 2021:12 [ref. 38178], Brandão et al. 2022:199 [ref. 40464], Giora & Wingert 2023:33 [ref. 41026], Loureiro et al. 2023:82 [ref. 40506]). Current status: Valid as Brachyhypopomus gauderio Giora & Malabarba 2009. Hypopomidae. Distribution: South America: Paraguay River basin, Rio Grande do Sul State (southern Brazil and Uruguay, Bolivia, Paraguay and Argentina). Habitat: freshwater.