melanoorus, Cynolebias Amato [L. H.] 1986:4, Pl. 2 (figs. 3-4) [Comunicaciones Zoologicas del Museo de Historia Natural de Montevideo v. 11 (no. 162); ref. 9170] Floodlands of Tres Cruces Creek, route 5, kilometers 399.5, Tacuarembó, Uruguay, 31°39.11'S, 55°54.01'W. Holotype: MHNM 2545. Paratypes: MHNM 2546-48 (24, 1, 33). Type catalog: Loureiro et al. 2016:413 [ref. 35150]. •Valid as Cynolebias melanoorus Amato 1986 -- (Costa 1995:73 [ref. 22097]). •Valid as Austrolebias melanoorus (Amato 1986) -- (Costa 1998:75 [ref. 23792], Lazara 2001:62 [ref. 25711], Costa 2002:917 [ref. 26505], Calviño 2003:11 [ref. 26595], Costa in Reis et al. 2003:528 [ref. 27061], Loureiro et al. 2004:27 [ref. 27658], Costa 2006:97 [ref. 28708], Costa 2009:188 [ref. 30417], Loureiro et al. 2011:340 [ref. 31392], Lanés et al. 2014:17 [ref. 33234], Litz & Koerber 2014:30 [ref. 33622], Bertaco et al. 2016:424 [ref. 34561], Nión et al. 2016:43 [ref. 35565], Loureiro et al. 2018:11 [ref. 36240], Serra & Loureiro 2018:554 [ref. 36329], Volcan & Severo-Neto 2019:550 [ref. 36539], Alonso et al. 2023:10 [ref. 40292], Loureiro et al. 2023:168 [ref. 40506]). Current status: Valid as Austrolebias melanoorus (Amato 1986). Rivulidae: Cynolebiinae. Distribution: South America: Uruguay River basin (Uruguay) and Rio Grande do Sul (Brazil). Habitat: freshwater.