melanops, Tridens Eigenmann [C. H.] & Eigenmann [R. S.] 1889:53 [Proceedings of the California Academy of Sciences (Series 2) v. 2; ref. 1253] Içá / Putumayo River, upper Amazon basin, Brazil. Syntypes: (27) CAS 64598 [IU 4275] (1); BMNH 1889.11.14.73 [ex MCZ] (1); MCZ 8137 (orig. 27, now 15, 2 c&s); USNM 41522 [ex MCZ 8137] (1), 120296 (orig. 4, now 3). Type catalog: Ferraris & Vari 1992:43 [ref. 19771], Ferraris 2007:426 [ref. 29155]. •Valid as Tridens melanops Eigenmann & Eigenmann 1889 -- (Burgess 1989:325 [ref. 12860], de Pinna & Wosiacki in Reis et al. 2003:286 [ref. 27061], Ferraris 2007:426 [ref. 29155], Barriga Salazar 2014:111 [ref. 35745], Sarmiento et al. 2014:193 [ref. 35004], DoNascimiento et al. 2017:71 [ref. 35633] with no species, see DoNascimiento et al. 2017:[15] [ref. 35679], Henschel et al. 2023:1 [ref. 40194]). Current status: Valid as Tridens melanops Eigenmann & Eigenmann 1889. Trichomycteridae: Tridentinae. Distribution: South America: Amazon River basin: Brazil, Ecuador, ?Colombia and Bolivia. Habitat: freshwater.