Atheta (Microdota) koreana Bernhauer, 1923

Lee, Seung-Gyu & Ahn, Kee-Jeong, 2015, A taxonomic review of Korean species of the AthetaThomsonsubgenusMicrodota Mulsant & Rey, with descriptions of two new species (Coleoptera, Staphylinidae, Aleocharinae), ZooKeys 502, pp. 61-97 : 70-73

Taxon classification Animalia Coleoptera Staphylinidae

Atheta (Microdota) koreana Bernhauer, 1923 Figs 7, 31, 40, 49, 58, 67, 76

Atheta (Microdota) koreana Bernhauer, 1923: 128; Cho and Ahn 2001: 32; Paśnik 2001: 208; Smetana 2004: 386 (as valid species).

Atheta (Amidobia) bulbosa Sawada, 1974: 179 (as valid species); Smetana 2004: 386 (as synonym of Atheta koreana ).

Ischnopoda (Atheta) koreana : Yuh et al. 1985: 251 (as valid species).

Atheta koreana : Kim et al. 1994: 144 (as valid species).

Material examined.

Syntype, 1♀, labeled as in Fig. 85. NORTH KOREA: 1 ex., Korea 25.5.1974 Jonghen ad Dżuyr Exp. Inst.Zool.Cr. [North Korea, Hamgyeongbuk Prov., Gyeongseong-gun, Yonghyeon-ri, 25 v 1974, ISEA]. SOUTH KOREA: Chungbuk Prov.: 3 exx., Boeun-gun, Maro-myeon, Imgok-ri, Mt. Cheontaesan, 6.viii.2000, MH Kim, mushroom; Chungnam Prov.: 7 exx., Gongju-si, Mt. Gyeryongsan, N36°21'17.4", E127°14'55.7" ,, 1-18.vi.2004, KJ Ahn, SM Choi, JS Park, FIT; 1 ex., Gongju-si, Sangsin-ri, Mt. Gyeryongsan, N36°22'03.2", E127°12'50" ,, 31. v– 18.vi.2004, SM Choi, JS Park, FIT; Gongju-si, Mt. Gyeryongsan, Eunseon-waterfall, N36°20'58.7", E127°12'41.3" ,, 1-18.vi.2004, SM Choi, JS Park, FIT; 6 exx., Gongju-si, Mt. Gyeryongsan, Donghaksa, N36°21'17.4", E127°14'55.7" ,, 1-18.vi.2004, SM Choi, JS Park, FIT; 9 exx., Gongju-si, Mt. Gyeryongsan, Dongwol, N36°19'39", E127°15'46.7" ,, KJ Ahn, SM Choi, JS Park, FIT; 5 exx., Gongju-si, Mt. Gyeryongsan, Gapsa, N36°22'03.2", E127°12'50" ,, 31. v– 18.vi.2004, KJ Ahn, SM Choi, JS Park, FIT; Gongju-si, Mt. Gyeryongsan, Nammaetap, N36°21'11.8", E127°13'20.8" ,, SM Choi, JS Park, FIT; Gangwon Prov.: 3 exx., Hoengseong-gun, Gangrim-myeon, Bugok-ri, Mt. Chiaksan, 15.viii.2000, MH Kim, rotten mushroom ( Boletaceae ); 6 exx., Hongcheon-gun, Nae-myeon, Gyebangsan, Unduryeong, 18.viii.2000, MH Kim, rotten mushroom ( Boletaceae ); 4 exx., Hongcheon-gun, Naecheon-myeon, Garyeong fall, 25. v– 20.vi.2002, KJ Ahn, SJ Park, JS Park, FIT; 9 exx., Pyeongchang-gun, Bangrim-myeon, Ungyo 2-ri, Mt. Baedeoksan, 12.vii.-16.viii.2001, KJ Ahn, SJ Park, CW Shin, FIT; 4 exx., Pyeongchang-gun, Jinbu-myeon, Mt. Odaesan, Sangwonsa, 18. v– 23.vi.2002, SJ Park, FIT; 2 exx., Sokcho-si, Mt. Seoraksan, Biseondae, 30. vii– 15.ix.2002, SJ Park, JS Park, FIT; 6 exx., Yeongwol-gun Yeongwol-eup, Taehawasan 14.viii.2001, MH Kim, rotten mushroom ( Boletaceae ); Gyeonggi Prov.: 3 exx., Gapyeong-gun, Buk-myeon, Mt. Myeongjisan, 25.vii.-30.viii.2001, KJ Ahn, SJ Park, CW Shin, FIT; 3 exx., Yangju-gun, Jangheung-myeon, Songchu-ri, Mt. Bukhansan, 24.iii.1998, YS Kim.

Description.

Length 1.5-1.8 mm. Body (Fig. 7) parallel-sided; surface glossy, densely pubescent, with fine microsculpture. Body usually yellowish brown to reddish brown; head and abdomen darker than other parts. Head. Slightly transverse, approximately 1.1-1.2 times wider than long, widest across eyes, slightly narrower than pronotum; eyes prominent, about 1.2-1.3 times longer than tempora; gular sutures moderately separated, diverged basally; infraorbital carina complete, cervical carina complete. Antennae (Fig. 31) dilated apically; antennomeres 1-3 elongate, 1 about as long as 11, 4-10 distinctly transverse, 11 longest, about as long as preceding two combined. Mouthparts. Labrum transverse, anterior margin emarginate, two lateral sensilla and about 8 macrosetae present on each side of midline; α-sensillum setaceous, more than twice as long as ε-sensillum, β- and γ-sensilla reduced. Mandibles asymmetrical, pointed apically, about 1.5-1.6 times as long as basal width; right one with small internal tooth, anterior margin serrulate; prostheca developed. Lacinia of maxilla with seven spines in distal comb, two isolated spines present; maxillary palpus elongate, with pubescence and long setae; palpomere 1 smallest and about 1.5-1.7 times as long as wide, 2 about 2.6-2.7 times longer than wide, 3 longer than 2, about 2.3-2.5 times as long as wide, 4 digitiform, filamentous sensilla reaching to basal half. Labium with ligula divided into two lobes in basal half; two medial setae narrowly separated; two basal pores close; lateral pseudopores, one setal pore and two real pores present on prementum; labial palpus elongate, with many setulae; palpomere 1 largest and dilated basally, about as long as wide, with γ-setula close b-setula, 2 shortest, about 1.4-1.6 times longer than wide, 3 slightly dilated apically, slightly shorter than 1, about 2.5 times longer than wide. Thorax. Pronotum transverse, approximately 1.2-1.3 times wider than long, widest at middle; pubescence directed anteriorly in midline. Metanotal scutum with one long seta and about 2-3 short setae on each side of midline; mesocoxal cavities narrowly separated, mesoventral process pointed at apex, longer than isthmus and metaventral process combined; length ratio of mesoventral process, isthmus and metaventral process 14:7:5. Elytra subquadrate and slightly dilated apically, slightly wider than pronotum; elytron approximately 1.6-1.7 times longer than wide, pubescence directed postero-laterally; postero-lateral margin almost straight; hind wings fully developed; flabellum composited about one setose lobe. Legs. Slender and long, with dense pubescence and setae; tibia with two spurs at apex; length ratio of tarsomeres 14:15:16:32 (protarsus); 17:19:20:20:40 (mesotarsus); 24:24:24:24:49 (metatarsus); one empodial seta present, shorter than claw. Abdomen. Parallel-sided, widest at middle; surface fairly glossy and densely pubescent, with slightly reticulate microsculpture; macrochaetal arrangement of tergites II–VI 01-02-12-12-13; male tergite VIII (Fig. 40) with 4 macrosetae on each side of midline, posterior margin truncate, with minute crenation; male sternite VIII with 7 macrosetae on each side of midline, posterior margin rounded; posterior margin of female tergite VIII subtruncate; posterior margin of female sternite VIII broadly rounded, slightly emarginate at middle, with long and short marginal setae; minute setae present in median region. Genitalia. Median lobe (Figs 49, 58) oval, apical process constricted in median region, convergent at apex in ventral aspect; internal sac complicated. Apical lobe of paramerites (Fig. 67) subparallel-sided and elongate, with four setae subequal in length. Spermatheca (Fig. 76) with very large bursa, duct one coiled apically.

Distribution.

Korea (South, North), China (Liaoning) and Japan.

Remarks.

This species is distinguished from similar species by the characters provided in Sawada (1974). Some specimens were found on mushrooms in forest areas.