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 ) vicaria ( Kraatz, 1859 ) ( Figs. 1G , 7 A–I) Homalota vicaria Kraatz, 1859: 38 . Homalota inornata Kraatz, 1859: 39 . Homalota peregrine Kraatz, 1859: 39 . Homalota termitophila Motschulsky, 1860: 91 . Atheta ( Acrotona ) pseudoparens Cameron, 1933: 215 . Atheta ( Acrotona ) taedia Cameron, 1933: 215 ; Sawada, 1977: 198 . Atheta ( Acrotona ) vicaria : Cameron, 1939: 396 . Atheta ( Acrotona ) inornata : Cameron, 1939: 406 . Atheta ( Acrotona ) cariei Pace, 1984: 263 . Atheta ( Acrotona ) immixta Pace, 1986: 175 . Acrotona vicaria : Paśnik, 2001: 204 . Acrotona inornata : Smetana, 2004: 364 ; Shibata et al ., 2013: 106 . Acrotona ( Acrotona ) vicaria : Schülke & Smetana, 2015: 510 ; Ahn et al ., 2017: 292 . Description. Length 2.3–2.7 mm . Body ( Fig. 1G ) surface fairly glossy and densely pubescent, with fine microsculpture. Body brown to dark brown; head almost black; elytra and legs brownish, paler than other parts. Head . Subcircular, approximately 1.0–1.1 times as wide as long, widest across eyes, distinctly narrower than pronotum; eyes large and prominent, about 1.5 times as long as temples; gular sutures moderately separated, diverged basally; cervical carina complete. Antennae ( Fig. 7A ) long and slender; antennomeres 1–3 elongate, 2 slightly longer than 3, 4 about as long as wide, 5–10 subquadrate to slightly transverse, 11 longest, slightly longer than preceding two combined. Mouthparts . Labrum transverse, slightly emarginate in anterior margin, with εsensillum and about eight macrosetae on each side of midline; epipharynx with several sensilla, including two lateral sensory rows on each side of midline; α-sensillum long and setaceous, about 2.0 times as long as εsensillum, β- and γ-sensilla very short, convergent at apex. Mandibles asymmetrical, subtriangular, decurved and pointed apically, about 1.6 times as long as basal width; right one with small internal tooth, internal margin slightly serrulate; prostheca developed, composed of three portions, second portion longer. Galea and lacinia of maxilla long and slender; lacinia composed of seven spines in distal comb region, two isolated spines present; maxillary palpus elongate with pubescence and long setae; palpomere 1 smallest, 2 about 2.6–2.8 times as long as wide, 3 slightly longer than 2, about 2.5–2.7 times as long as wide, 4 digitiform, filamentous sensilla almost reaching to basal half. Labium with ligula divided into two lobes in basal third; prementum with two medial setae moderately narrowly separated; two basal pores widely separated, more than 5.0 times width of basal pore; several medial pseudopores, lateral pseudopores and one setal pore and two real pores present on each side of midline; labial palpus elongate, with many setulae; palpomere 1 largest, about 1.5–1.7 times as long as wide, γ-setula contiguous with b-seta, 2 shortest, about 1.3–1.5 times as long as wide, 3 subparallel-sided and about as long as 1, about 3.5 times as long as wide. Mentum trapezoidal, anterior margin slightly emarginate; v-seta relatively short, close to useta. Thorax . Pronotum approximately 1.3 times as wide as long, widest in basal third to half; pubescence directed posteriorly in midline. Metanotal scutum with one long seta and about three to five short setae on each side of midline. Mesocoxal cavities narrowly separated; mesoventral process pointed at apex, distinctly longer than isthmus and metaventral process combined; length ratio of mesoventral process, isthmus and metaventral process 7:2:2. Elytra slightly transverse, wider than pronotum; elytron approximately 1.5–1.6 times as long as wide, postero-lateral margin slightly sinuate; pubescence directed posterior and postero-laterally; hind wings fully developed, flabellum composed of about six setose lobes. Legs . Slender and long, with pubescence and macrosetae; tibiae with subequal length of two spurs at apex; tarsal formula 4-5-5, length ratio of tarsomeres 20:23:24:57 (protarsus); 35:45:40:35:60 (mesotarsus); 75:45:42:42:73 (metatarsus); empodial seta present, shorter than claw. Abdomen . Widest in segments III–IV; surface fairly glossy and densely pubescent, with fine and imbricate microsculpture; conspicuous macrosetae present in lateral regions; macrochaetal arrangement of tergites II–VI 01-12-13-13-13; tergite VII subquadrate; male tergite VIII ( Fig. 7B ) with four macrosetae on each side of midline, posterior margin subtruncate; male sternite VIII ( Fig. 7C ) with about eleven macrosetae on each side of midline, five of which positioned in truncate posterior margin; female tergite VIII ( Fig. 7D ) similar to male’s; female sternite VIII ( Fig. 7E ) with six macrosetae on each side of midline, posterior margin truncate, with long marginal setae, minute setae present in median region. Aedeagus . Median lobe ( Figs. 7 F–G) narrowly ovate, apical process elongate and pointed apically in ventral aspect; internal sac relatively simple and elongate. Apical lobe of paramerites ( Fig. 7H ) pointed apically with four setae; a-seta positioned basally, d-seta longer and close to c-seta, b-seta positioned apically. Spermatheca . Bursa with blunt umbilicus; duct once coiled ( Fig. 7I ). FIGURE 7. Acrotona ( Acrotona ) vicaria . A: antenna; B: male abdominal tergite VIII (dorsal aspect); C: male abdominal sternite VIII (ventral aspect); D: female abdominal tergite VIII (dorsal aspect); E: female abdominal sternite VIII (ventral aspect); F: median lobe of aedeagus (lateral aspect); G: median lobe of aedeagus (ventral aspect); H: paramere (lateral aspect); I: spermatheca. Scales = 0.1 mm. Type material. Syntype , 1♂ , labeled as follows: ‘ Syn-type , Arni Gad Mussoorie., Dr. Cameron. 28 - v. 21. M.Cameron Bequest , B.M.1955–147., a. Kraatziana n. n (vili Kr), Atheta inornata (KR.) det. R . Pace 1986 COMPARED WITH TYPE’ . Syntypes , 1♂ 1♀ , labeled as follows: ‘SYN-TYPE, JAPAN Kobe, J.E.A. LEWIS , a. pseudoparens Cam TYPE , M.Cameron Bequest , B.M.1955–147., Atheta pseudoparens P.M. Hammond det. 1973 SYNTYPE’ . Holotype , ♂ , labeled as follows: ‘ Holo-type , JAPAN Kobe Harada 3. VII 32 J.E.A. LEWIS , M. Cameron Bequest , B.M.1955–147., a. Taedia Cam. TYPE , Atheta Taedia Cam. P.M. Hammond det. 1973 HOLOTYPE’ . Material examined. NORTH KOREA : 1♂ , Korea CERJONG Hwanghe-pukto leg. Pawlowski 9.1971 [North Korea, Hwanghaebuk Prov., Cerjong, ix 1971 , Pawlowski ] . SOUTH KOREA : Chungbuk Prov . : 9 exx., Jecheon-si , Hansu-myeon , Songgye-ri , Songgye valley , 30 viii 1996 , YB Cho , under grasses. Chungnam Prov . : 1 ex. , Buyeo-gun , Mt. Mansusan , 20 VII 1999 , US Hwang , HJ Kim , sifting ; 1 ex. , same data as former except for ‘ 19 vii 1999 , KJ Ahn , black light’ ; 1 ex. , Daejeon-si , Yuseong-gu , Chungnam nat. univ., 19 iv 2002 , JS Park, sifting; 1 ex. , same data as former except for ‘ 16 vi–15 vii 2003 , JH Choi , DH Lee , SM Choi , FIT’ ; 1 ex. , Daejeon-si , Mt. Gyeryongsan , Sutonggol , 26 vi 1999 , HJ Kim , near stream ; 1 ex. , Daejeon-si , Secheon-dong , Mt. Sikjangsan , Secheon park, 17 viii 1999 , HJ Kim , near stream ; 1 ex. , Hongseong-gun , Gwangcheon-eup , Oseosan , 20 vi 1999 , HJ Kim , sifting; 5 exx., same data as former except for ‘ 19–21 vi 1999 , US Hwang and HJ Kim , FIT’; 2 exx., Gongju-si , Mt. Gyeryongsan , Sinwonsa , 26 v 2002 , MH Kim , under rotten herb ; 1 ex. , same data as former except for ‘ 17 vii 2002 , C Shin , near stream’. Gangwon Prov . : 1 ex. , Goseong-gun , Jinburyeong , 13 ix 1998 , KJ Ahn , KL You , HJ Lim , leaf litter ; 1 ex. , Pyeongchang-gun , Bangnim-myeon , Mt. Baekdeoksan , 12 vii 2001 , KJ Ahn , SJ Park , decaying vegetable ; 1 ex. , Yeongwol-gun , Ssangyong-ri , 29 viii 1996 , YB Cho. Gyeongbuk Prov . : 19 exx., Bonghwa-gun , Mt. Seondalsan , 23–25 vi 1998 , KL You , HJ Lim , FIT ; 1 ex. , Daegu-si , Buk-gu , Gyeongbuk National University , 18 vii 1986 ; 1 ex. , same data as former except for ‘ 6 ix 1986 ’. 1 ex. , Asan-si , Eumbongmyeon , Ssangyong-ri , 28 vi 2006 , N36°51'44.5" E127°04'15.7" 147 m , SJ Park , YH Kim , HW Kim , mushroom ; 1 ex. , Muju-gun , Seolcheon-myeon , Mt. Deogyusan , 22–24 v 1998 , KL You, HJ Lim. Gyeonggi Prov . : 1 ex. , Incheon-si , Songdo , 25 vi 1988 , YS Kim. Jeju Prov . : 1 ex. , Jeju-si , Jocheon-eup , Goepyeongioreum , 28 v 2003 , SJ Park, CW shin, MJ Jeon , sifting ; 1 ex. , same data as former except for ‘ 13 vi 2005 , SJ Park , MJ Jeon , SI Lee , sifting. Jeonbuk Prov . : 1 ex. , Muju-gun , Mt. Deogyusan , Chilyeon-fall , 22–24 v 1998 , KL You , HJ Lim , FIT. Jeonnam Prov . : 1 ex. , Yeongam-gun , Mt. Wolchulsan , 21 iii 1987 , JC Paik ; 1 ex. , Wando-gun , Sinji-myeon , N34.32998 E126.80656 , 1 viii 2003 , SJ Park , JS Park , sifting . Distribution. Korea (South, North), China ( Beijing , Hong Kong , Sichuan, Yunnan, Zhejiang), Japan , India (Darjeeling District, Sikkim , Uttaranchal, Uttar Pradesh ), Nepal , Afrotropical and Oriental regions. Remarks. This species was first recorded in North Korea by Paśnik (2001) and is recorded here for the first time in South Korea .