ykeregua, Australoheros Říčan [O.], Piálek [L.], Almirón [A. E.] & Casciotta [J. R.] 2011:9, Figs. 4-7 [Zootaxa No. 2982; ref. 31455] Arroyo Paraiso (or Canal Muerto), 27°14'15.1"S, 54°02'38.5"W, río Uruguay basin, Argentina. Holotype: MACN-ict 9467. Paratypes: MLP 10471 [ex AI 270] (3, c&s, now 1); MACN-ict 9468 (4), -9469 (3), -9470 (3), -9471 (4), -9472 (13). Plus non-type material. Nadalin & López 2015:8 [ref. 34112]. •Valid as Australoheros ykeregua Říčan, Piálek, Almirón & Casciotta 2011 -- (Ottoni 2012:84 [ref. 31900], Ottoni 2013:166 [ref. 32901], Koerber 2014:14 [ref. 33621], Mirande & Koerber 2015:59 [ref. 35117], Říčan et al. 2016:28 [ref. 34357], Říčan & Říčanová 2017:5 [ref. 35635]). Current status: Valid as Australoheros ykeregua Říčan, Piálek, Almirón & Casciotta 2011. Cichlidae: Cichlinae. Distribution: Middle Río Uruguay basin, Argentina. Habitat: freshwater.