rex, Kronia de Buen [F.] 1953:64, Figs. 38-41 [Boletim do Instituto Oceanografico, São Paulo v. 4 (no. 1-2); ref. 694] La Paloma, Depto. de Rocha, Uruguay. Holotype: MHNM CI 1803 [ex VT 1050]. Paratypes: (4). Type catalog: Olazarri et al. 1970:6 [ref. 23527], Loureiro et al. 2016:413 [ref. 35150]. •Synonym of Odontesthes argentinensis (Valenciennes 1835) -- (Dyer 1998:535 [ref. 23858], Bemvenuti 2002:256 [ref. 26202], Dyer in Reis et al. 2003:521 [ref. 27061], Koerber & Litz 2014:5 [ref. 34967], Koerber & Litz 2016:6 [ref. 35098]). Current status: Synonym of Odontesthes argentinensis (Valenciennes 1835). Atherinopsidae: Atherinopsinae. Habitat: freshwater, brackish, marine.