Plesiolebias Costa [W. J. E. M.] 1989:193 Masc. Cynolebias xavantei Costa, Lacerda & Tanizaki 1988. Type by original designation. Date of publication is 1989. Also appeared in Costa 1990 (28 Feb.):86 [ref. 16650]. •Valid as Plesiolebias Costa 1989 -- (Costa 1991 [ref. 13611], Costa 1995:24 [ref. 22097], Costa 1995:73 [ref. 21612], Costa 1998:318 [ref. 23324], Costa 1998:81 [ref. 23792], Costa 1998:140 [ref. 23879], Britski et al. 1999:139 [ref. 24147], Murphy et al. 1999:293 [ref. 25492], Lazara 2001:257 [ref. 25711], Costa in Reis et al. 2003:533 [ref. 27061], Costa 2004:2 [ref. 27874], Huber 2005:15 [ref. 28394], Costa 2007:20 [ref. 28993], Huber 2012:14 [ref. 32947], Loureiro et al. 2018:5 [ref. 36240]). Current status: Valid as Plesiolebias Costa 1989. Rivulidae: Rivulinae.