orientalis, Odontesthes de Buen [F.] 1950:149, Fig. 1 [Publicaciones Cientificas, Servicio Oceanografico y de Pesca, Ministerio de Industrias y Trabajo, Montevideo No. 3; ref. 12928] Bañado de Legrand, adjacent to the reservoir Rincón del Bonete, Río Negro, rio Uruguay basin, Uruguay. Holotype: MHNM CI 1808 [ex VT 1054]. Paratypes: (20, lost?). Type catalog: Olazarri et al. 1970:7 [ref. 23527], Loureiro et al. 2016:413 [ref. 35150]. •Synonym of Basilichthys perugiai (Evermann & Kendall 1906) -- (authors). •Valid as Odontesthes orientalis de Buen 1950 -- (Dyer 1998:535 [ref. 23858], Dyer & Gosztonyi 1999:215 [ref. 24265], Malabarba & Dyer 2002:269 [ref. 26538], Dyer in Reis et al. 2003:522 [ref. 27061], Nión et al. 2016:41 [ref. 35565]). •Synonym of Odontesthes perugiae Evermann & Kendall 1906 -- (Bemvenuti 2002:276 [ref. 26202], Wingert et al. 2017:511 [ref. 35244]). Current status: Synonym of Odontesthes perugiae Evermann & Kendall 1906. Atherinopsidae: Atherinopsinae. Habitat: freshwater.