micropterus, Megalamphodus Eigenmann [C. H.] 1915:54, Fig. 16; Pl. 8 (fig. 1) [Memoirs of the Carnegie Museum v. 7 (no. 1); ref. 1231] Rio São Francisco at Lagoa do Porto, Brazil. Holotype: FMNH 57916 [ex CM 6900a]. Paratypes: (62) CAS [ex IU 14122; CM 6901] (3, missing), CAS 98918 [ex IU 14123; CM 6903] (6), FMNH 57917-20 (14, 9, 25, 1), CAS-SU 17514 [ex CM 6903] (5). Type catalog: Henn 1928:59 [ref. 12305], Böhlke 1953:25 [ref. 12291], Ibarra & Stewart 1987:55 [ref. 12367]. •Valid as Hyphessobrycon micropterus (Eigenmann 1915) -- (Weitzman & Palmer 1997:232 [ref. 22743], Lima & Gerhard 2001:110 [ref. 25355], Lima & Malabarba in Reis et al. 2003:138 [ref. 27061], Zanata & Camelier 2010:776 [ref. 31077], Dagosta et al. 2014:373 [ref. 33382], Bragança et al. 2015:260 [ref. 34051], Pastana et al. 2017:13 [ref. 35596], Zanata et al. 2018:[11] [ref. 35863], Guimarães et al. 2018:82 [ref. 35965], Guimarães et al. 2019:354 [ref. 36774], Silva et al. 2020:6 [ref. 37809], Guimarães et al. 2020:106 [ref. 37899], Lima et al. 2021:347 [ref. 38293], Vieira-Guimarães et al. 2024:38 [ref. 41258]). •Valid as Megalamphodus micropterus Eigenmann 1915 -- (Melo et al. 2024:21 [ref. 41541]). Current status: Valid as Megalamphodus micropterus Eigenmann 1915. Acestrorhamphidae: Megalamphodinae. Distribution: South America: São Francisco River basin (Brazil). Habitat: freshwater.