tridens, Hemibrycon Eigenmann [C. H.] 1922:152 [Memoirs of the Carnegie Museum v. 9 (no. 1); ref. 1243] Río Apurimac at Uruhuasi, southeastern Peru. Holotype: CAS 44358 [ex IU 13723]. •Valid as Hemibrycon tridens Eigenmann 1922 -- (Ortega & Vari 1986:8 [ref. 9708], Malabarba in Reis et al. 2003:130 [ref. 27061], Bertaco et al. 2007:256 [ref. 29278], Bertaco & Malabarba 2010:765 [ref. 31076], Román-Valencia et al. 2014:120 [ref. 33572], Thomaz et al. 2015:Add. 5 [ref. 33893]). Current status: Valid as Hemibrycon tridens Eigenmann 1922. Characidae: Stevardiinae. Distribution: Río Apurimac drainage, upper Ucayali River basin, Peru. Habitat: freshwater.