The present study was carried out to revise the species of Chlaeniini in Carabidae from Korea, using both classic taxonomy and molecular analysis. Another aim is to decide the taxonomic position of Chlaenius micans Fabricius of which subgeneric status in the genus has been in question. As a part of the results, Chlaenius spathulifer Bates, 1873 was newly recognized to Korean insect fauna. With this new addition Korean Chlaeniini contains now in total 34 species and two genera. This study provids a key to species, photos of adult habitus, photos of male genitalia and redescriptions of 28 Korean species in Chlaeniini.

The present study was carried out to revise the species of Chlaeniini in Carabidae from South Korea, using both classic taxonomy and molecular analysis. Another aim is to decide the taxonomic position of Chlaenius micans Fabricius of which subgeneric status in the genus has been in question. As a part of the results, Chlaenius spathulifer Bates, 1873 was newly recognized to Korean insect fauna. With this new addition Korean Chlaeniini contains now in total 34 species and two genera. Molecular analyses using CO1 sequences of representative species for six subgenera in Chlaenius were conducted to determine the position of C. micans. The result of the analyses suggested that C. micans did not belong to the subgenus Achlaenius where C. micans had been doubtfully positioned despite distinct morphological differences from the other four species of the variicornis-group (C. sericimicans, C. variicornis, C. kurosawai and C. ocreatus) in the subgenus. This study provids a key to species, photos of adult habitus, photos of male genitalia and redescriptions of 28 Korean species in Chlaeniini.

Genus Chlaenius Bonelli, 1810 of the tribe Chlaeniini is a cosmopolitan group distributed in all zoogeographical region. General characteristics of Chlaenius are with pubescent or metallic luster on the pronotum and elytra, and antennal second segment shorter than third segment. Members of subgenus Ocybatus are similar to those of subgenera Lissauchenius and Chlaenioctenus in having a round yellow spot on each elytron, but it showed difference from them having apical segment of labial palpi strongly securiform. Subgenus Ocybatus Laferté-Sénectere, 1851 belonging to the genus Chlaenius were reported three species from Paleoarctic region: Chlaenius (Ocybatus) junceus Andrewes, 1923, Chlaenius (Ocybatus) spathulifer Bates, 1873, Chlaenius (Ocybatus) bioculatus Chaudoir, 1856, among them Chlaenius (Ocybatus) bioculatus Chaudoir, 1856 has been recorded in Korea. In here Chlaenius (Ocybatus) spathulifer Bates reported firstly from Korea. Description and photo of adult are provided.