nigromaculatus, Simpsonichthys Costa [W. J. E. M.] 2007:200, Figs. 1-2 [Ichthyological Exploration of Freshwaters v. 18 (no. 3); ref. 29338] Temporary swamp, near the road GO-050, Chapadão do Céu, 18°33'02.0"S, 52°37'43.1"W, Floodplains of rio da Prata, rio Aporé drainage, upper rio Paraná basin, Estado de Goiás, Brazil, elevation 778 meters. Holotype: UFRJ 6467. Paratypes: UFRJ 6468 (5), 6469 (3, c&s), 6473 (2). •Valid as Simpsonichthys nigromaculatus Costa 2007 -- (Costa 2007:31 [ref. 29445], Costa 2012:314 [ref. 31750], Nielsen et al. 2017:166 [ref. 35304], Nielsen et al. 2017:166 [ref. 35304]). Current status: Valid as Simpsonichthys nigromaculatus Costa 2007. Rivulidae: Cynolebiinae. Distribution: Prata River floodplains, Aporé River drainage, upper Paraná River basin, Goiás, Brazil. Habitat: freshwater.