A taxonomic review of the AthetaThomsonsubgenusMicrodota Mulsant & Rey in Korea is presented. The subgenus is represented in Korea by 15 species including two new species, Atheta (Microdota) jangtaesanensis Lee & Ahn, sp. n. and Atheta (Microdota) pasniki Lee & Ahn, sp. n. Four species [Atheta (Microdota) kawachiensis Cameron, Atheta (Microdota) muris Sawada, Atheta (Microdota) spiniventris Bernhauer, and Atheta (Microdota) spinula (Sawada)] are new to the Korean Peninsula and two [Atheta (Microdota) formicetorum Bernhauer and Atheta (Microdota) subcrenulata Bernhauer] to South Korea. Two other species [Atheta (Microdota) kobensis Cameron and Atheta (Microdota) scrobicollis (Kraatz)] previously recorded in North Korea had been identified incorrectly. A key, descriptions, habitus photographs and illustrations of the diagnostic features are provided. Species distributions and diversity in East Asia are discussed.
Keywords: Aleocharinae; Atheta; Coleoptera; Korea; Microdota; Staphylinidae; new species.