melanotaenia, Cynolebias Regan [C. T.] 1912:506 [Annals and Magazine of Natural History (Series 8) v. 10 (no. 59); ref. 3648] Vila da Quinta, about 32°10'S, 52°20'W, Munic. de Rio Grande, Estado do Rio Grande do Sul, Brazil. Syntypes: BMNH 1909.9.5.15-22 (9). For information on type locality see Buckup & Malabarba 1990:103 [ref. 16740]. •Valid as Cynolebias melanotaenia Regan 1912 -- (Malabarba 1989:159 [ref. 14217]). •Valid as Cynopoecilus melanotaenia (Regan 1912) -- (Costa 1995:102 [ref. 22097], Costa 1998:74 [ref. 23792], Lazara 2001:79 [ref. 25711], Costa 2002:13 [ref. 26061], Costa in Reis et al. 2003:530 [ref. 27061], Ferrer et al. 2014:847 [ref. 33589], Litz & Koerber 2014:31 [ref. 33622], Costa et al. 2016:3 [ref. 34354], Bertaco et al. 2016:424 [ref. 34561], Costa 2016:130 [ref. 34776], Nión et al. 2016:43 [ref. 35565] with author as Regan 1912, Loureiro et al. 2018:11 [ref. 36240], Garcez et al. 2020:[3] [ref. 37602], Loureiro et al. 2023:172 [ref. 40506]). Current status: Valid as Cynopoecilus melanotaenia (Regan 1912). Rivulidae: Cynolebiinae. Distribution: South America: Atlantic coastal drainages (southern Brazil and Uruguay). Habitat: freshwater.