boulengeri, Hemigrammus Eigenmann [C. H.] in Eigenmann & Ogle 1907:15 [Proceedings of the United States National Museum v. 33 (no. 1556); ref. 1266] Rio Grande do Sul, Brazil. Holotype (unique): CAS 44379 [ex IU 11073]. •Valid as Hyphessobrycon boulengeri (Eigenmann 1907) -- (Malabarba 1989:134 [ref. 14217], Lima & Malabarba in Reis et al. 2003:135 [ref. 27061], Bertaco & Malabarba 2005:86 [ref. 28297], Bertaco et al. 2007:248 [ref. 29277], Carvalho & Langeani 2013:526 [ref. 32913], Litz & Koerber 2014:15 [ref. 33622], Teixeira et al. 2016:474 [ref. 34088], Bertaco et al. 2016:413 [ref. 34561], Petry et al. 2016:302 [ref. 34966], Nión et al. 2016:30 [ref. 35565] dated 1918 without parentheses, Reis et al. 2020:459 [ref. 38364], Giora & Wingert 2023:134 [ref. 41026], Loureiro et al. 2023:78 [ref. 40506]). Current status: Valid as Hyphessobrycon boulengeri (Eigenmann 1907). Acestrorhamphidae: Hyphessobryconinae. Distribution: South America: coastal river drainages of Rio Grande do Sul State (Brazil and Uruguay). Habitat: freshwater.