janeiroensis, Astyanax Eigenmann [C. H.] 1908:96 [Bulletin of the Museum of Comparative Zoology v. 52 (no. 6); ref. 1221] Rio de Janeiro, Brazil. Holotype (unique): MCZ 21057. •Valid as Astyanax janeiroensis Eigenmann 1980 -- (de Melo 2001:26 [ref. 27458], Buckup in Reis et al. 2003:110 [ref. 27061] Vari & Castro 2007:159 [ref. 29039], Catelani et al. 2014:931 [ref. 37496], Petry et al. 2016:301 [ref. 34966], da Graça et al. 2017:13 [ref. 35556]). •Valid as Deuterodon janeiroensis (Eigenmann 1908) -- (Reis et al. 2020:459 [ref. 38364], Terán et al. 2020:7 [ref. 37440], Vieira-Guimarães et al. 2024:38 [ref. 41258]). Current status: Valid as Deuterodon janeiroensis (Eigenmann 1908). Acestrorhamphidae: Stygichthyinae. Distribution: South America: streams around Rio de Janeiro (Brazil). Habitat: freshwater, brackish.