Gnatholebias Costa [W. J. E. M.] 1998:77 Masc. Pterolebias zonatus Myers 1935. Type by original designation. •Synonym of Pterolebias Garman 1895 -- (Schindler 2004:74 [ref. 28034]). •Valid as Gnatholebias Costa 1998 -- (Lazara 2001:167 [ref. 25711], Costa in Reis et al. 2003:530 [ref. 27061], Costa 2003:156 [ref. 27616], Costa 2004:2 [ref. 27874], Costa 2005:21 [ref. 28393], Huber 2005:14 [ref. 28394], Costa 2014:177 [ref. 35439], Loureiro et al. 2018:6 [ref. 36240]). Current status: Valid as Gnatholebias Costa 1998. Rivulidae: Rivulinae.