nigromarginatus, Melanorivulus Costa [W. J. E. M.] 2018:21, Figs. 4-5 [Zoosystematics and Evolution v. 94 (no. 1); ref. 35717] Córrego Lajeado, Rio Corrente drainage, upper Rio Paraná basin, road GO-178, Itarumã municipality, Goiás State, Brazil, 18°49'45"S, 51°22'55"W, elevation about 470 meters. Holotype: UFRJ 8434. Paratypes: CICCAA, UFRJ. •Valid as Melanorivulus nigromarginatus Costa 2018 -- (Volcan et al. 2018:275 [ref. 35895]). Current status: Valid as Melanorivulus nigromarginatus Costa 2018. Rivulidae: Rivulinae. Distribution: South America: upper Rio Paraná basin, central Brazilian Cerrado, Brazil. Habitat: freshwater.