oxianus, Squalius Kessler [K. F.] 1877:124 [The Aralo-Caspian Expedition; ref. 2597] Lower part of Amu Darya River, and Kunja-Urgentsch in delta of Amu Darya River, Uzbekistan. Syntypes: (2) ?Univ. of St. Petersburg 463, none found at ZIN. •Synonym of Leuciscus idus (Linnaeus 1758) -- (Kottelat 1997:67 [ref. 22952], Bogutskaya 1998:64 [ref. 23589], Kottelat 2006:39 [ref. 28831]). •Synonym of Leuciscus idus (Linnaeus 1758), but a valid subspecies as described -- (Berg 1949:567 [ref. 20661], Mitrofanov et al. 1987:118 [ref. 37731], Reshetnikov et al. 1997:738 [ref. 24702], Kozhara et al. 2023:445 [632] [ref. 40779]). •Valid as Leuciscus oxianus (Kessler 1877). Current status: Valid as Leuciscus oxianus (Kessler 1877). Leuciscidae: Leuciscinae. Distribution: Central Asia: Amu Darya River basin. Habitat: freshwater, brackish.