nelsoni, Melanorivulus Deprá [G. C.], Pains da Silva [H.] & da Graça [W. J.] 2017:113, Figs. 1-2 [Zootaxa 4300 (no. 1); ref. 35503] Unnamed creek tributary to the córrego Beleza, tributary to the rio São Lourenço (rio Paraguai basin), municipality of Juscimeira, Mato Grosso, Brazil, 16°10'57"S, 55°0'40"W. Holotype: MCP 50981. Paratypes: NUP. Type catalog: Oliveira et al. 2022:34 [ref. 39255]. •Valid as Melanorivulus nelsoni Deprá, Pains da Silva & da Graça 2017. Current status: Valid as Melanorivulus nelsoni Deprá, Pains da Silva & da Graça 2017. Rivulidae: Rivulinae. Distribution: South America: Rio São Lourenço drainage, upper Rio Paraguai basin (Mato Grosso, Brazil). Habitat: freshwater.