marginatus, Hemigrammus Ellis [M. D.] 1911:159, Pl. 3 (fig. 3) [Annals of the Carnegie Museum v. 8 (no. 1, art. 2); ref. 1269] Rio Itapicurú at Queimadas, Bahia, Brazil, circa 10°58'S, 39°38'W. Holotype: FMNH 54430 [ex CM 3053]. Paratypes: (141) FMNH 54431-33 (1, 20, 4), 54435-43 (6, 17, 42, 5, 6, 5, 3, 9, 1), 54452 (1), 54457-59 (1, 1, 1), 54756 (3), 54919 (2). Type catalog: Henn 1928:65 [ref. 12305], Ibarra & Stewart 1987:45 [ref. 12367]. •Valid as Hemigrammus marginatus Ellis 1911 -- (Ortega & Vari 1986:8 [ref. 9708], Taphorn 1992:209 [ref. 23654], Britski et al. 1999:39 [ref. 24147], Lima & Oyakawa in Reis et al. 2003:132 [ref. 27061], Marinho et al. 2008:58 [ref. 29547], Carvalho et al. 2010:253 [ref. 30862], Barriga Salazar 2014:107 [ref. 35745], Ramos et al. 2014:3 [ref. 35321], Sarmiento et al. 2014:184 [ref. 35004], Ota et al. 2015:228 [ref. 33748], Petry et al. 2016:302 [ref. 34966] as aff. marginatus, Costa et al. 2017:44 [ref. 35684], see DoNascimiento et al. 2017:[8] [ref. 35679], Silva et al. 2020:6 [ref. 37809], Meza-Vargas et al. 2021:18 [ref. 39298], Lima et al. 2022:253 [ref. 39116], Quintela et al. 2023:6 [ref. 40727], Lima & Marinho 2024:177 [ref. 40817], Vieira-Guimarães et al. 2024:38 [ref. 41258]). Current status: Valid as Hemigrammus marginatus Ellis 1911. Acestrorhamphidae: Pristellinae. Distribution: South America: São Francisco River drainage and other river drainages (northeastern Brazil). Habitat: freshwater.