A taxonomic review of the Acrotona Thomson in the Korean Peninsula is presented. The genus is represented in Korea by seven species including a new species, Acrotona (Acrotona) koreana Lee Ahn, sp. nov. Two new synonyms are proposed: A. (A.) lutulenta (Sharp) = A. (A.) suyangsani Paśnik syn. nov., A. (A.) pseudotenera (Cameron) = A. (A.) paeksongricus Paśnik syn. nov. Three species [A. (A.) lutulenta (Sharp), A. (A.) pseudotenera (Cameron) and A. (A.) vicaria (Kraatz)] are reported for the first time in South Korea. A key, descriptions, habitus photographs and illustrations of the diagnostic characters are provided.
Keywords: Coleoptera, Staphylinidae, Aleocharinae, Athetini, Acrotona, new species, Korea.