Hypsolebias (subgenus of Simpsonichthys) Costa [W. J. E. M.] 2006:17 Masc. Cynolebias flavicaudatus Costa & Brasil 1990. Type by original designation. •Synonym of Simpsonichthys Carvalho 1959, but a valid subgenus Hypsolebias as described -- (Costa 2007:54 [ref. 29445], Nielsen et al. 2010:57 [ref. 30828], Costa 2010:1997 [ref. 30858]). •Valid as Hypsolebias Costa 2006 -- (Costa & Amorim 2011:99 [ref. 31380], Costa 2011:221 [ref. 31654], Costa et al. 2012:72 [ref. 31845], Nielsen et al. 2012:63 [ref. 32283], Costa et al. 2013:1 [ref. 32952], Costa 2013:141 [ref. 33008], Nielsen et al. 2014:27 [ref. 33143], Costa 2014:25 [ref. 33309], Nielsen et al. 2014:131 [ref. 33451], Ponzetto et al. 2016:[7] [ref. 34144] but paraphyletic, Britzke et al. 2016:123 [ref. 34461], Costa et al. 2018:141 [ref. 36034], Loureiro et al. 2018:8 [ref. 36240], Costa et al. 2018:495 [ref. 36319], Ramos et al. 2023:1 [ref. 40546], Abrantes et al. 2023:545 [ref. 40706]). Current status: Valid as Hypsolebias Costa 2006. Rivulidae: Cynolebiinae.