brevis, Tridens Eigenmann [C. H.] & Eigenmann [R. S.] 1889:54 [Proceedings of the California Academy of Sciences (Series 2) v. 2; ref. 1253] Tabatinga, Amazonas, Brazil. Holotype (unique): MCZ 8160. Type catalog: Ferraris 2007:426 [ref. 29155]. •Valid as Tridensimilis brevis (Eigenmann & Eigenmann 1889) -- (Burgess 1989:325 [ref. 12860], de Pinna & Wosiacki in Reis et al. 2003:286 [ref. 27061], Ferraris 2007:426 [ref. 29155], Sarmiento et al. 2014:193 [ref. 35004], see DoNascimiento et al. 2017:[15] [ref. 35679], Meza-Vargas et al. 2021:24 [ref. 39298]). •Valid as Tridentopsis brevis (Eigenmann & Eigenmann 1889) -- (Datovo et al. 2023:19 [ref. 40547]). Current status: Valid as Tridentopsis brevis (Eigenmann & Eigenmann 1889). Trichomycteridae: Tridentinae. Distribution: South America: Amazon River basin (Bolivia, Brazil and Peru). Habitat: freshwater.