difficilis, Cambeva Costa [W. J. E. M.], Feltrin [C. R. M.] & Katz [A. M.] in Costa, Feltrin, Mattos & Katz 2024:345, Figs. 2A-C, 3, 4 [Taxonomy v. 4 (no. 2); ref. 41163] Rio da Cachoeira, 2.6 km below Cachoeira dos Pretos, Rio Tietê drainage, Rio Paraná basin, Município de Joanópolis, Estado de São Paulo, Brazil, 22°57'15"S, 46°10'46"W, elevation about 870 meters. Holotype: UFRJ 13962. Paratypes: UFRJ 5772 (1), 5773 (1), 13963 (1). •Valid as Cambeva difficilis Costa, Feltrin & Katz 2024. Current status: Valid as Cambeva difficilis Costa, Feltrin & Katz 2024. Trichomycteridae: Trichomycterinae. Distribution: South America: Rio Tietê drainage, upper Rio Paraná basin, São Paulo State, southeastern Brazil. Habitat: freshwater.