Imparfinis Eigenmann [C. H.] & Norris [A. A.] 1900:351 Masc. Imparfinis piperatus Eigenmann & Norris 1900. Type by monotypy. •Valid as Imparfinis Eigenmann & Norris 1900 -- (Mees 1974:167 [ref. 2969], Stewart 1986:46 [ref. 5777], Stewart 1986:667 [ref. 5211], Burgess 1989:277 [ref. 12860], Mees & Cala 1989 [ref. 14277], Bockmann 1994:767 [ref. 21608], de Pinna 1998:315, 316 [ref. 23847], Bockmann & Guazzelli in Reis et al. 2003:413 [ref. 27061], Ferraris 2007:185 [ref. 29155], Almirón et al. 2007:817 [ref. 29443], Bockmann & Castro 2010:692 [ref. 31072], Ortega-Lara et al. 2011:777 [ref. 31716], Bertaco et al. 2016:417 [ref. 34561], Castro & Wosiacki 2019:461 [ref. 37139], Grant 2021:161 [ref. 38702], Silva et al. 2023:357 [ref. 40041], Cortés-Hernández et al. 2023:1 [ref. 40341]). Current status: Valid as Imparfinis Eigenmann & Norris 1900. Heptapteridae: Heptapterinae.