atronasus, Ageneiosus Eigenmann [C. H.] & Eigenmann [R. S.] 1888:149 [Proceedings of the California Academy of Sciences (Series 2) v. 1 (pt 2); ref. 1249] South America ("exact locality unknown"). Holotype (unique): MCZ 27270. Type catalog: Ferraris 2007:68 [ref. 29155]. •Valid as Ageneiosus atronasus Eigenmann & Eigenmann 1888 -- (Burgess 1989:286 [ref. 12860], Burgess & Finley 1996:167 [ref. 22901], Ferraris in Reis et al. 2003:471 [ref. 27061], Schraml 2005:20 [ref. 28585], Ferraris 2007:68 [ref. 29155], Ribeiro & Rapp Py-Daniel 2010:102 [ref. 30759], Barriga Salazar 2014:115 [ref. 35745], Birindelli 2014:535 [ref. 33501], Sarmiento et al. 2014:141, 189 [ref. 35004]). •Valid as Tympanopleura atronasus (Eigenmann & Eigenmann 1888) -- (Walsh et al. 2015:13 [ref. 33781], DoNascimiento et al. 2017:86 [ref. 35633], Calegari et al. 2019:[98] [ref. 36961], Careaga et al. 2020:77 [ref. 37774], Hashimoto et al. 2020:[3] 16 [ref. 37940], Meza-Vargas et al. 2021:23 [ref. 39298]). Current status: Valid as Tympanopleura atronasus (Eigenmann & Eigenmann 1888). Auchenipteridae: Auchenipterinae. Distribution: South America: Amazon River basin (Bolivia, Brazil, Ecuador, Colombia and Peru). Habitat: freshwater.