A taxonomic review of Korean Acrotona Thomson with a description of new species (Coleoptera, Staphylinidae, Aleocharinae) Author Lee, Seung-Gyu Division of Forest Biodiversity, Korea National Arboretum, Pocheon 11186, South Korea. jspdi @ naver. com Author Ahn, Kee-Jeong Department of Biology, Chungnam National University, Daejeon 34134, South Korea. kjahn @ cnu. ac. kr text Zootaxa 2018 2018-05-08 4418 3 247 263 journal article 22661 10.11646/zootaxa.4418.3.3 bace504a-09db-4a62-a010-f903f2d92d22 1175-5326 3769610 959FE164-2912-42F8-B44E-52DC26B85C5A Acrotona ( Acrotona ) setaria ( Brundin, 1952 ) ( Fig. 1E ) Atheta setaria Brundin, 1952: 124 . Acrotona setaria : Paśnik, 2001: 204 ; Smetana, 2004: 365 . Acrotona ( Acrotona ) setaria : Schülke & Smetana, 2015: 510 ; Ahn et al ., 2017: 292 . Description. Length about 2.0 mm. Body ( Fig. 1E ) surface glossy and densely pubescent, with fine microsculpture. Body brown to dark brown; head and abdomen darker than other parts; elytra and legs paler. Head . Circular, about as wide as long, widest at middle, distinctly narrower than pronotum; eyes large and slightly prominent, about 1.3–1.4 times as long as temples; gular sutures moderately separated, diverged basally. Antennae long and slender, longer than head and pronotum combined; antennomeres compactly close together, 1–3 elongate, 1 about as long as 11, 2 about as long as 3, 4 quadrate, 5–10 subquadrate to slightly transverse, 11 longest, about as long as preceding two combined. Thorax . Pronotum approximately 1.4 times as wide as long, widest in basal third to half, pubescence directed posteriorly in midline. Elytra slightly transverse, slightly wider than pronotum; elytron approximately 1.4–1.5 times as long as wide, pubescence directed posteriorly and postero-laterally; postero-lateral margin slightly sinuate; hind wings fully developed. Legs . Slender and long, with pubescence and macrosetae; tibiae with two spurs at apex. Abdomen . Widest in segments III–IV; surface glossy and densely pubescent; tergites III–IV impressed, V slightly impressed in basal region; male tergite VIII with four macrosetae on each side of midline, posterior margin subtruncate; posterior margin of male sternite VIII broadly round, with about six macrosetae in median region. Aedeagus . Median lobe elongate, apical process elongate and straight, about as long as basal portion in lateral aspect ( Brundin, 1952 : fig. 44). Material examined. NORTH KOREA : 1♂ , Corea spet. 1983 Myohyangsan Mts. Exp. Inst.Zool.Cr. [North Korea, Pyeonganbuk Prov., Mt. Myohyangsan, 1983, ISEA ] . Distribution. Korea (North), Mongolia and Turkmenia. Remarks. This species was recorded in North Korea by Paśnik (2001) and no specimen has been collected in South Korea . We could not describe the mouthparts in detail because no specimen was available for dissection.