gracilis, Trichomycterus Valenciennes [A.] in Cuvier & Valenciennes 1846:497 [Histoire naturelle des poissons v. 18; ref. 1011] Río Azangaro near Guasacona, Río Guatanai near Cusco, Río Pontezualo near Coroico, Compucila west of Cuzco, Peru, elevation 14,000 feet. Syntypes: MNHN 0000-3129 (2) Río Pontezualo, 0000-4063 (2) Río Azangaro, A-9766 (6) Río Guatanai, B-0588 (2) Compucila. Type catalog: Bertin & Estève 1950:61 [ref. 19575], Ferraris 2007:422 [ref. 29155]. •Valid as Trichomycterus gracilis Valenciennes 1846 -- (Arratia 1998:354 [ref. 23661]). •Synonym of Trichomycterus rivulatus Valenciennes 1846 -- (de Pinna & Wosiacki in Reis et al. 2003:284 [ref. 27061], Ferraris 2007:422 [ref. 29155]). Current status: Synonym of Trichomycterus rivulatus Valenciennes 1846. Trichomycteridae: Trichomycterinae. Habitat: freshwater.