Catalogue of Lepidoptera of Omsk Region (Russia). Microlepidoptera. Families: Eriocraniidae, Nepticulidae, Opostegidae, Adelidae, Prodoxidae, Incurvariidae, Psychidae, Tineidae, Roeslerstammiidae, Bucculatricidae, Gracillariidae, Yponomeutidae, Argyresthi

A total of 781 species of Microlepidoptera belonging to 41 families are reported for the territory of Omsk Region. The most numerous is the Tortricidae family represented by 255 species, then Crambidae (94 species), Gelechiidae (70), Pyralidae (66), Pterophoridae (44), Depressariidae (32), Gracillariidae (29), Tineidae (25), Elachistidae (14), Adelidae and Elachistidae (8 species in each family), Yponomeutidae, Ypsolophidae, Ethmiidae and Cosmopterigidae (7 species in each family), Scythrididae and Oecophoridae (6 species in each family), Eriocraniidae (4), Nepticulidae, Momphidae and Epermeniidae (3 species in each family), Prodoxidae, Glyphipterigidae, Lyonetiidae and Choreutidae (2 species in each family), Opostegidae, Incurvariidae, Roeslerstammiidae, Argyresthiidae, Plutelliidae, Acrolepiidae, Bedelliidae, Parametriotidae, Chimabachidae, Cryptolechiidae, Batrachedridae, Blastobasidae, Autostichidae, Galacticidae (1 species in each family). 10 species are new to the Omsk Region. Agonopterix purpurea (Haworth, 1811) and Aethes flagellana (Duponchel, 1836) are reported from the territory of Omsk Region as new to the Asian Part of Russia; Fomoria weaveri (Stainton, 1855) reported from the territory of West Siberia for the first time.