brevis, Ageneiosus Steindachner [F.] 1881:16 [Denkschriften der Kaiserlichen Akademie der Wissenschaften in Wien, Mathematisch-Naturwissenschaftliche Classe. v. 44 (in 1882); ref. 14299] Amazon River at Coary and Hyavary, Brazil. Syntypes: (4) NMW 47801 (2). Type catalog: Ferraris 2007:69 [ref. 29155]. Species not included in earlier abstract [ref. 20484]. •Valid as Ageneiosus brevis Steindachner 1881 -- (Burgess 1989:286 [ref. 12860], Burgess & Finley 1996:167 [ref. 22901], Ferraris in Reis et al. 2003:471 [ref. 27061], Ferraris 2007:69 [ref. 29155], Ribeiro & Rapp Py-Daniel 2010:102 [ref. 30759], Barriga Salazar 2014:115 [ref. 35745] as cf. brevis, Sarmiento et al. 2014:141, 189 [ref. 35004]). •Valid as Tympanopleura brevis (Steindachner 1881) -- (Walsh et al. 2015:19 [ref. 33781], DoNascimiento et al. 2017:86 [ref. 35633], Calegari et al. 2019:[98] [ref. 36961], Hashimoto et al. 2020:[3] 16 [ref. 37940], Meza-Vargas et al. 2021:23 [ref. 39298]). Current status: Valid as Tympanopleura brevis (Steindachner 1881). Auchenipteridae: Auchenipterinae. Distribution: South America: Amazon River basin (Bolivia, Brazil, ?Ecuador, Colombia and Peru). Habitat: freshwater.