pictus, Rivulus Costa [W. J. E. M.] 1989:525, Figs. 2-2a [Revista Brasileira de Zoologia v. 6 (no. 3); ref. 14319] Fumal Creek at road crossing, Formosa, District Federal, Brazil. Holotype: MNRJ 11550. Paratypes: MNRJ 11551 (2), MZUSP 39975 (2). Plus non-type material. Type catalog: Huber 1992 [ref. 20639]. See Lazara 2001:283 [ref. 25711] for first reviser information. •Valid as Rivulus pictus Costa 1989 -- (Huber 1992:358 [ref. 20639], Costa 1995:212 [ref. 21883], Lazara 2001:282 [ref. 25711], Costa et al. 2003:144 [ref. 26946], Costa 2003:41 [ref. 26966], Costa in Reis et al. 2003:538 [ref. 27061], Costa 2003:2 [ref. 27635], Costa 2005:71 [ref. 28192], Costa 2006:162 [ref. 28875] in subgenus Melanorivulus, Costa 2008:88 [ref. 29717]). •Valid as Melanorivulus pictus (Costa 1989) -- (Costa 2011:241 [ref. 31655], Costa 2012:57 [ref. 32069], Nielsen et al. 2016:87 [ref. 34407], Volcan et al. 2017:92 [ref. 35156], Deprá et al. 2017:117 [ref. 35503], Volcan et al. 2018:275 [ref. 35895]). Current status: Valid as Melanorivulus pictus (Costa 1989). Rivulidae: Rivulinae. Distribution: Paraná River and Rio Corumbá basins, Brazil. Habitat: freshwater.