EN
Review of the O. korbi species-group is given. 5 species and 1 subspecies, including four new taxa are known from Southern Anatolia: O. korbi (Reitter, 1902), O. perarmatus Nabozhenko et Tichý, 2006, O. svetlanae sp. nov. svetlanae subsp. nov., O. svetlanae beydagensis subsp. nov., O. nasreddini sp. nov., O. nialgorzatae sp. nov. Morphological characters of species-group, bionomics and distribution are discussed.