marginatus, Simpsonichthys Costa [W. J. E. M.] & Brasil [G. C.] 1996:94, Figs. 1-2 [Revue française d'Aquariologie Herpétologie v. 23 (no. 3/4); ref. 22917] Temporary pool near Rio dos Patos, tributary of Rio Maranhao, Rio Tocantins basin, Barro Alto, Goiás State, Brazil [ca. 15°00'S, 49°00'W]. Holotype: MNRJ 12440. Paratypes: MNRJ 12441 (1); MZUSP 50163 (2); UFRJ 3536 (7), 3537 (4, c&s). •Valid as Simpsonichthys marginatus Costa & Brasil 1996 -- (Costa 1998:75 [ref. 23792], Lazara 2001:298 [ref. 25711], Costa in Reis et al. 2003:541 [ref. 27061], Costa 2006:17 [ref. 28620], Costa 2007:116 [ref. 29445], Costa 2008:156 [ref. 29874], Costa 2008:156 [ref. 29874]). •Valid as Hypsolebias marginatus (Costa & Brasil 1996) -- (based on generic placement in Costa 2011 [ref. 31654]). Current status: Valid as Hypsolebias marginatus (Costa & Brasil 1996). Rivulidae: Cynolebiinae. Distribution: Rio dos Patos floodplain, Tocantins River basin, Goiás, central Brazil. Habitat: freshwater.