A new Cteipolia Staudinger, 1896 species from Russian Altai (Lepidoptera, Noctuidae)

A new species, Cteipolia altaica Knyazev et Ivonin, sp.n. from Altai Republic (Russia, Siberia), is described. New species is morphologically similar to C. murina (Ménétriés, 1848), C. isotima Püngeler, 1914 and C. amissa Gordeeva, Gordeev, G. Ronkay, L. Ronkay, 2023, but it differs in some external features, as well as in the structure of the genitals. The article presents an images of type specimens, the genital preparations of both sexes, diagnosis and the distributional map of Cteipolia species in Russia and Kazakhstan.