nudus, Cottus Sideleva [V. G.] 2021:259, Figs. 7-9 [Voprosy Ikhtiologii v. 61 (no. 3); ref. 38323] Mashat River near Kershetas, tributary of the Arys River, Syr-Darya basin, Kazakhstan. Holotype: ZIN 56577. Preoccupied by Cottus kessleri nudus Dybowski 1908, permanently invalid. •Not valid as Cottus nudus Sideleva 2021. 1°Homonym. Current status: Synonym of Cottus. Cottidae. Habitat: freshwater.