harmonicus, Simpsonichthys Costa [W. J. E. M.] 2010:74, Figs. 1-2 [Ichthyological Exploration of Freshwaters v. 21 (no. 1); ref. 30777] Seasonal pool close to road BR-349, ca. 12 kilometers of the left bank of São Francisco River, 13°15'42"S, 43°31'28"W, Município de Bom Jesus da Lapa, Estado de Bahia, Brazil. Holotype: UFRJ 6696. Paratypes: UFRJ 6697 (14), 6698 (4, c&s). •Valid as Simpsonichthys harmonicus Costa 2010. •Valid as Hypsolebias harmonicus (Costa 2010) -- (Costa 2011:221 [ref. 31654], Costa et al. 2012:73 [ref. 31845], Nielsen et al. 2014:28 [ref. 33143], Nielsen et al. 2014:132 [ref. 33451], Costa et al. 2018:155 [ref. 36034], Silva et al. 2020:14 [ref. 37809]). Current status: Valid as Hypsolebias harmonicus (Costa 2010). Rivulidae: Cynolebiinae. Distribution: South America: floodplains of São Francisco River (Bahia State, Brazil). Habitat: freshwater.