castaneus, Eurycheilichthys Reis [R. E.] 2017:[11], Figs. 2d, 9 [Neotropical Ichthyology v. 15 (no. 1); ref. 35226] Arroio Burro Preto, tributary to rio Guaporé, rio Taquari basin, on road RS-324, between Passo Fundo and Marau, Marau, Rio Grande do Sul, Brazil, 28°21'29"S, 52°15'51"W, elevation above 400 meters. Holotype: MCP 40664. Paratypes: AMNH, MCP, MZUSP. Plus additional non-type material. •Valid as Eurycheilichthys castaneus Reis 2017 -- (Delapiewe et al. 2023:2 [ref. 40645]). Current status: Valid as Eurycheilichthys castaneus Reis 2017. Loricariidae: Hypoptopomatinae. Distribution: South America: Rio Guaporé drainage, Taquari-Antas basin (Rio Grande do Sul, Brazil). Habitat: freshwater.