janeiroensis, Hypopomus Costa [W. J. E. M.] & Campos-da-Paz [R.] 1992:118, Figs. 2-3 [Revue française d'Aquariologie Herpétologie v. 18 (no. 4) [for 1991]; ref. 19726] Corrego Salto-d'agua, tributary of Rio São Joao, 6 kilometers north of Silva Jardim, 22°39'S, 42°23'W, Rio de Janeiro, Brazil. Holotype: MZUSP 43130. Paratypes: MNRJ 529 (3), 598 (4), 599 (2), 12127 (1); MZUSP 43131 (7). Type catalog: Ferraris et al. 2017:[23] [ref. 35236]. •Valid as Brachyhypopomus janeiroensis (Costa & Campos-da-Paz 1992) -- (Mago-Leccia 1994:48 [ref. 21320], Albert & Crampton in Reis et al. 2003:495 [ref. 27061], Triques & Khamis 2003:63 [ref. 27465], Giora et al. 2008:160 [ref. 29707], Giora & Malabarba 2009:60 [ref. 30168], Sullivan & Hopkins 2009:183 [ref. 30151], Almirón et al. 2010:572 [ref. 31124], Di Dario et al. 2013:262 [ref. 37503], Sullivan et al. 2013:3 [ref. 32879], Catelani et al. 2014:931 [ref. 37496], Crampton et al. 2016:55 [ref. 34832], Crampton et al. 2017:735 [ref. 35114], Ferraris et al. 2017:[23] [ref. 35236], Dutra et al. 2021:12 [ref. 38178]). Current status: Valid as Brachyhypopomus janeiroensis (Costa & Campos-da-Paz 1992). Hypopomidae. Distribution: South America: São João and Paraíba do Sul River basins (Brazil). Habitat: freshwater, brackish.