nigroauratus, Trichomycterus Barbosa [M. A.] & Costa [W. J. E. M.] 2008:175, Figs. 1-2, 7A, 8A [aqua, International Journal of Ichthyology v. 14 (no. 4); ref. 29961] Cachoeira da Usina, rio do Barreiro, tributary of rio Paraíba do Sul basin, 22°40'29.5"S, 44°34'49.6"W, Município de São José do Barreiro, Estado de São Paulo, Brazil, elevation 600 meters. Holotype: UFRJ 6034. Paratypes: many at UFRJ. •Valid as Trichomycterus nigroauratus Barbosa & Costa 2008 -- (Barbosa & Costa 2010:121 [ref. 30782], Barbosa & Costa 2010:194 [ref. 31070], Barbosa & Costa 2011:308 [ref. 31672], Datovo et al. 2012:35 [ref. 31994], Katz & Barbosa 2014:3 [ref. 33418], Costa et al. 2020:81 [ref. 38088], Costa et al. 2022:10 [ref. 39248], Vilardo et al. 2023:5 [ref. 40643]). Current status: Valid as Trichomycterus nigroauratus Barbosa & Costa 2008. Trichomycteridae: Trichomycterinae. Distribution: South America: upper Paraíba do Sul basin (São Paulo, Brazil). Habitat: freshwater.