Reappraisal of Korean Oxyporus Fabricius (Coleoptera: Staphylinidae: Oxyporinae), including a new species based on morphological and molecular characters

A taxonomic reappraisal of some species of Korean Oxyporus Fabricius is presented based on morphological and molecular characters (COI and 28S). A new species (O. parvus Lee and Ahn sp. nov.) and a new record (O. procerus Kraatz) are recognized in the Korean peninsula. The new species is superficially similar to O. germanus Sharp but can be separated by the structures of the median lobe of the aedeagus and molecular characters (partial COI and 28S). The minimum interspecific difference between O. parvus Lee and Ahn, sp. nov. and O. germanus (9.3–10.6%) was much higher than the maximum intraspecific difference between O. parvus Lee and Ahn, sp. nov. (2.1%) and they contained 7 and 4 molecular diagnostic characters, respectively. Three previous incorrect identifications are discussed and they (O. basicornis Cameron, O. basiventris Jarrige, and O. crocatus Fauvel) are excluded from the Korean fauna. The molecular analyses support the validity of the new species and the other five Korean species based on morphological characters. Descriptions with illustrations of habitus and diagnostic features of the new species and the new record are provided.