cinereus, Cynolebias Amato [L. H.] 1986:9, Pl. 6 (fig. 10) [Comunicaciones Zoologicas del Museo de Historia Natural de Montevideo v. 11 (no. 162); ref. 9170] Floodlands on route 21, 2 kilometers northwest of Viboras Creek, Colonia, Uruguay. Holotype: MHNM 2542. Paratypes: MHNM 2385 (2), 2533-35 (1, 1, 2), 2614 (1), 2615 (1), 2626 (15); ZVC-P 797 (49). Type catalog: Loureiro et al. 2016:412, 414 [ref. 35150]. •Valid as Cynolebias cinereus Amato 1986 -- (Costa 1995:70 [ref. 22097], Berkenkamp et al. 1997:32 [ref. 23147]). •Valid as Austrolebias cinereus (Amato 1986) -- (Costa 1998:75 [ref. 23792], Lazara 2001:61 [ref. 25711], Costa 2002:917 [ref. 26505], Calviño 2003:11 [ref. 26595], Costa in Reis et al. 2003:527 [ref. 27061], Costa et al. 2004:15 [ref. 27657], Costa 2006:31 [ref. 28708], Costa 2009:188 [ref. 30417], Costa 2011:100 [ref. 31504], Litz & Koerber 2014:30 [ref. 33622], Nión et al. 2016:42 [ref. 35565], Loureiro et al. 2018:11 [ref. 36240], García et al. 2019:[12] [ref. 36487], Koerber et al. 2020:9 [ref. 37480], Koerber et al. 2021:9 [ref. 38894], Loureiro et al. 2023:169 [ref. 40506]). •Valid as Cypholebias cinereus (Amato 1986) -- (Alonso et al. 2023:12 [ref. 40292], Koerber et al. 2023:10 [ref. 40355]). Current status: Valid as Cypholebias cinereus (Amato 1986). Rivulidae: Cynolebiinae. Distribution: South America: lower Paraná and Uruguay River basin and Laguna dos Patos system (Uruguay and Brazil). Habitat: freshwater.