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 ) aterrima ( Gravenhorst, 1802 ) ( Fig. 1A ) Aleochara aterrima Gravenhorst, 1802: 83 . Bolitochara fuscula Mannerheim, 1830: 84 . Aleochara mannerheimii C. R. Sahlberg, 1831: 380 . Aleochara brunnipes Stephens, 1832: 133 . Aleochara luripes Stephens, 1832: 136 . Aleochara obscurata Stephens, 1832: 137 . Homalota lugens Kiesenwetter, 1844: 319 . Atheta ( Acrotona ) aterrima : Brundin, 1952: 121 ; Palm, 1970: 288 ; Benick & Lohse, 1974: 187 ; Yosii & Sawada, 1976: 94 . Acrotona aterrima : Paśnik, 2001: 202 ; Smetana, 2004: 362 . Acrotona ( Acrotona ) aterrima : Schülke & Smetana, 2015: 506 ; Ahn et al ., 2017: 292 . FIGURE 1. Habitus. A, Acrotona ( Acrotona ) aterrima ; B, A . ( A .) koreana sp. nov. ; C, A . ( A .) lutulenta ; D, A . ( A .) pseudotenera ; E, A . ( A .) setaria ; F, A . ( A .) suspiciosa suspiciosa ; G, A . ( A .) vicaria . Description. Length 2.0– 2.5 mm . Body ( Fig. 1A ) surface glossy and densely pubescent, with fine microsculpture. Body dark brown to black; antennae, elytra and legs slightly paler than other parts. Head . Subcircular, about as wide as long, widest at middle, distinctly narrower than pronotum; eyes large and slightly prominent, about as long as temples; gular sutures moderately separated, diverged basally. Antennae long and slender, slightly longer than head and pronotum combined; antennomeres compactly close together, 1–3 elongate, 1 longest, 2 slightly longer than 3, 4–10 quadrate to subquadrate, 11 longer than wide, about as long as preceding two combined. Thorax . Pronotum approximately 1.5 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 1.5 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; metatarsomere 1 about as long as 2. Abdomen . Widest in segments III–IV; surface glossy and densely pubescent, with narrowly imbricate microsculpture; macrochaetal arrangement 01-13-13-13-13; male tergite VIII with four macrosetae on each side of midline, posterior margin truncate; male sternite VIII with seven macrosetae on each side of midline, posterior margin convex, slightly round, with inconspicuous and long marginal setae; posterior margin of female tergite VIII similar to male’s; female sternite VIII round, with long and short marginal setae. Aedeagus . Median lobe narrowly ovate and widest in basal third, apical process short and convergent at apex in ventral aspect ( Brundin, 1952 : figs. 40–41; Palm, 1970 : PL. XX, 194; Yosii & Sawada, 1976 : figs. 39J–L). Apical lobe of paramerites short, with four setae; a-seta slightly longer than b- and d-setae, c-seta short and close together ( Yosii & Sawada, 1976 : figs. 39M). Spermatheca . Umbilicus absent; duct densely coiled ( Palm, 1970 : PL. XX, 194; Yosii & Sawada, 1976 : figs. 39O). Type material. Lectotype , ♂ , labeled as follows: ‘ Germania Nr. 5506, Typus , Zool. Mus. Berlin , TYPE A. aterrima Grav. LECTO-TYPE V . Mahler des. 1986, aterrima Er. at. aterrima gr., Acrotona aterrima (Grav.) Det. Klimaszewski 2004 ’. Syntypes , 4 exx., Germania Nr. 5506, Typus , Zool.Mus. Berlin , Acrotona aterrima (Grav.) Det. Klimaszewski 2004 . Material examined. NORTH KOREA : 5 exx., Corea sept. 1983 Myohyang Mts. Exp. Inst.Zool.Cr. [North Korea, Pyeonganbuk Prov., Mt. Myohyangsan, ix 1983 , ISEA ] . Distribution. Korea (North), Russia (East Siberia, West Siberia), Kazakhstan , Uzbekistan and Europe. Remarks. This species was recorded by Paśnik (2001) in North Korea but no specimen has been collected from South Korea . We could not describe the mouthparts in detail because specimens were not available for dissection.