New species of the spring flat moths of the genera Semioscopis Hübner and Luquetia Leraut (Lepidoptera: Depressariidae) from Far East of Russia with notes on related species

Two new species (Semioscopis fareastenica sp. nov. and Luquetia tigrina sp. nov.) of the spring flat moths from Far East of Russia are described. The type specimen of Semioscopis japonicella Saito is revised. The molecular analysis based on a fragment of the mtCOI gene for Semioscopis spp. and Luquetia spp. was done for estimation of their genetic divergence. The interspecific genetic distances in these genera and minimal threshold for delimitation of species are discussed. The illustrations of the adults and the genitalia of both sexes of spring flat moths are provided. All available data on each taxon of the spring depressariid moths represented in East Asia are summarized and specified. Semioscopis strigulana is recorded for Primorskii Krai (Far East of Russia) for the first time. A checklist for East Asia species from genera Semioscopis and Luquetia is compiled.