Melanorivulus nelsoni Deprá, Silva & da Graça, 2017: 114, fig. 1.

Paratypes: 4 lots, 17 specimens —NUP 18967, 5, 20.1–33.1 mm SL: Brazil, Mato Grosso, Juscimeira, córrego Beleza, rio São Lourenço basin, rio Paraguai basin, 16°10’58”S, 55°0’54”W, H.P. Silva, 18 Jan 2014 . NUP 18968, 4, 20.8–35.3 mm SL: same locality and collector as previous, 30 Apr 2014 . NUP 18969, 7 (1 c&s, 23.6 mm SL), 17.5–32.5 mm SL: Brazil, Mato Grosso, Juscimeira, unnamed creek tributary to the córrego Beleza, tributary to the rio São Lourenço (rio Paraguai basin), 16°10’57”S, 55°0’40”W, H.P. Silva, 29 Apr 2014 . NUP 18970, 1, 29.0 mm SL: same locality and collector as previous, 9 May 2016 .