nigricollis, Tympanopleura Eigenmann [C. H.] & Allen [W. R.] 1942:139, Pls. 5 (figs. 2-3), 6 (fig. 3) [Fishes of western South America; ref. 1246] Iquitos, upper Amazon River basin, Peru. Holotype: CAS 57940 [ex IU 15788]. Paratypes: CAS 57941 [ex IU 15788b-d] (3), CAS 57942 [ex IU 15789] (1). Type catalog: Ferraris 2007:68 [ref. 29155]. •Valid as Tympanopleura nigricollis Eigenmann & Allen 1942 -- (Ortega & Vari 1986:14 [ref. 9708], Burgess 1989:286 [ref. 12860]). •Synonym of Ageneiosus atronasus Eigenmann & Eigenmann 1888 -- (Ferraris in Reis et al. 2003:471 [ref. 27061], Ferraris 2007:68 [ref. 29155]). •Synonym of Tympanopleura atronasus (Eigenmann & Eigenmann 1888) -- (Walsh et al.2015:14 [ref. 33781]). Current status: Synonym of Tympanopleura atronasus (Eigenmann & Eigenmann 1888). Auchenipteridae: Auchenipterinae. Habitat: freshwater.