regularis, Melanorivulus Costa [W. J. E. M.] 2017:61, Fig. 6 [ZooKeys No. 645; ref. 35046] Ribeirão da Sobra, upper Rio Itiquira drainage, Rio Paraguai basin, Alto Graças municipality, Mato Grosso state, Brazil, 16°54'41"S, 53°37'55"W, elevation approximately 750 meters. Holotype: UFRJ 6878. Paratypes: CICCAA, UFRJ. •Valid as Melanorivulus regularis Costa 2017 -- (Deprá et al. 2017:121 [ref. 35503]). Current status: Valid as Melanorivulus regularis Costa 2017. Rivulidae: Rivulinae. Distribution: Upper Rio Itiquira drainage, Rio Paraguai basin, Mato Grosso, Brazil. Habitat: freshwater.