Deuterodon Eigenmann [C. H.] in Eigenmann, McAtee & Ward 1907:140 Masc. Deuterodon iguape Eigenmann 1907. Type by monotypy. •Valid as Deuterodon Eigenmann 1907 -- (Géry 1977:519 [ref. 1597], Géry et al. 1988:10 [ref. 6408], Lucena & Lucena 1992:126 [ref. 21970], Britski et al. 1999:36 [ref. 24147], Lucena & Lucena 2002:117 [ref. 26205], Lucena et al. in Reis et al. 2003:127 [ref. 27061], Mirande 2009:7 [ref. 30267] in Characidae, Hemigrammus clade, Mirande 2010:500 [ref. 31006] in Characidae, Tetragonopterinae, de Lucena & de Lucena 2013:598 [ref. 32570], Sarmiento et al. 2014:184 [ref. 35004], Bertaco et al. 2016:413 [ref. 34561], Silva et al. 2017:[1] [ref. 35234], Terán et al. 2020:7 [ref. 37440], Melo et al. 2024:17 [ref. 41541] in Stygichthyinae). Current status: Valid as Deuterodon Eigenmann 1907. Acestrorhamphidae: Stygichthyinae.