Atheta (Datomicra) dadopora Thomson, 1867 (Figs 1 B, 3A–I) Atheta dadopora Thomson, 1867: 283. Atheta (Microdota) bufonis Bernhauer, 1900: 40. Datomicra decolorata Casey, 1910: 120. Datomicra inopia Casey, 1910: 120. Datomicra schematica Casey, 1910: 121. Datomicra stilla Casey, 1910: 123. Atheta crebrepunctata G. Benick, 1940: 185. Atheta (Datomicra) boopoides Scheerpeltz, 1958: 78. Atheta (Datomicra) dadopora: Palm, 1970: 271; Benick & Lohse, 1974: 189; Smetana, 2004: 379; Schülke & Smetana, 2015: 527. Atheta (Datostiba) poroshrica Sawada, 1978: 243. Atheta (Datomicra) shuteae Pace, 1987b: 420. Diagnosis. Length 1.5–2.0 mm. Body dark brown to black; legs paler brown. Head. Slightly transverse, approximately 1.2 times as wide as long, widest across eyes, narrower than pronotum; eyes large and prominent, about 1.4–1.5 times as long as temples; infraorbital carina complete; cervical carina complete. Antennae (Fig. 3 A) moderately long and slender; antennomeres 1–3 elongate, 1 longest, 4 about as long as wide, 5–10 subquadrate to slightly transverse, 11 longer than wide, about as long as preceding two combined. Thorax. Pronotum approximately 1.3–1.4 times as wide as long, widest at middle; hypomera almost fully visible in lateral aspect. Elytra slightly longer and wider than pronotum; elytron approximately 1.4–1.5 times as long as wide, posterolateral margin almost straight. Abdomen. Subparallel-sided; surface glossy and densely pubescent, with reticulate microsculpture; macrochaetal arrangement of tergites II–VI 02-03-13 -13-13; male tergite VIII (Fig. 3 B) with four macrosetae on each side of midline, posterior margin with four short and blunt processes, outer processes slightly longer than inner processes; male sternite VIII (Fig. 3 C) with seven or eight macrosetae on each side of midline, posterior margin convex, slightly rounded; posterior margin of female tergite VIII (Fig. 3 D) concave; female sternite VIII (Fig. 3 E) with about six macrosetae on each side of midline, posterior margin slightly emarginate. Aedeagus. Median lobe (Figs 3 F–G) narrowly ovate, apical process subparallel-sided and blunt at apex in ventral aspect; internal sac narrowly elongate. Apical lobe of paramerites (Fig. 3 H) slightly convergent at apex, with four setae; a- and b-seta shorter than d-seta, c-seta slightly longer than d-seta. Spermatheca. Bursa without umbilicus; duct short (Fig. 3 I). Material examined. SOUTH KOREA: Chungbuk Prov.: 1 ex. (on slide), Danyang-gun, Yeongcheon-myeon, Mt. Taehwasan, 14 vii–14 viii 2001, KJ Ahn, SJ Park, CW Shin, FIT; 28 ex. (one on slide), Yeongdong-gun, Sangchon-myeon, Mulhan-ri, Mt. Minjujisan, N 36˚03'35.2" E127˚52'31.3", 518 m, 18 v 2011, JG Lee, TK Kim, SG Lee, decaying persimmon. Gangwon Prov.: 2 exx., Hoengseong-gun, Gangrim-myeon, Bugok-ri, Mt. Chiaksan, 15 viii 2000, MH Kim, rotten mushroom (Boletaceae); 1 ex., Hongcheon-gun, Naecheon-myeon, Garyeong fall, 25 v–20 vi 2002, KJ Ahn, SJ Park, JS Park, FIT; 3 exx., Inje-gun, Buk-myeon, Mt. Seoraksan, Changam-valley, N38°13′00.6″ E128°25′12.3″ 545 m, 9 vi 2011, SG Lee, Decaying foods; 1 ex., Sokcho-si, Mt. Seoraksan, Hwaamsa, 30 vii–14 ix 2002, SJ Park, CW Shin, FIT; 5 exx., Pyeongchang-gun, Bangnim-myeon, Ungyo-ri, Mt. Baekdeoksan, 12 vii–16vii 2001, KJ Ahn, SJ Park, CW Shin, FIT; 5 exx. (one on slide), Pyeongchang-gun, Jinbu-myeon, Dongsan-ri, Mt. Odaesan, Sangwonsa, 22 vi–16 viii 2001, SJ Park, CW Shin, FIT; 6 exx., same data as former except for ‘ 22 viii 2000, MH Kim, mushroom’; 4 exx., same data as former except for ‘ N37°47′.10″ E128°33′.57.2″, 10 V 2007, TK Kim, YH Kim, FIT’; 6 exx., same data as former except for ‘ 18 v–23 vi 2002, SJ Park, JS Park, FIT’; 2 exx., Pyeongchang-gun, Mt. Odaesan, Jeokmyeolbogung, 7–9 vii 1998, KL You, HJ Lim, FIT; 44 exx. (two on slide), Pyeongchang-gun, Pyeongchang-eup, Noron-ri, Mt. Sambangsan, 13 vii–15 viii 2001, KJ Ahn, SJ Park, CW Shin, FIT; 3 exx., same data as former except for ‘ SJ Park, CW Shin, FIT in Pinus forest’; 2 exx., same data as former except for ‘under bark’; 2 exx., Sokcho-si, Mt. Seoraksan, Biseondae, 30 vii–15 ix 2002, SJ Park, JS Park, FIT; 2 exx., same data as former except for ‘ 30 vii 2002, JS Park, mushroom’; 2 exx. Yangyang-gun, Mt. Seoraksan, Osaekyaksu, 31 vii–15 ix 2002, SJ Park, CW Shin, JS Park, FIT. Gyeongbuk prov.: 6 exx., Yeongyang-gun, Irwol-myeon, Mt. Irwolsan, N36°49'23.4 ˝ E129°05'46.8" 633 m, 26 viii 2010, JH Song, SG Lee, mushroom. Jeonbuk Prov.: 1 ex. (in 95 % ETOH), Gochang-gun, Haeri-myeon, Goseong-ri, N 35˚26´40.7˝ E126˚33´0.6˝, 1 v 2007, TK Kim, YH Kim, dung. Distribution. Korea (South), China (Beijing, Gansu), India (Kashmir), Japan, Europe and Nearctic region. Remarks. Atheta (Datomicra) dadopora is similar to A. (D.) celata, A. (D.) lewisiana and A. (D.) nigra, but can be distinguished by the characters provided in the key and different shape and structure of aedeagus and spermatheca. This species is recorded for the first time in Korea and some specimens were collected from mushroom in forest.

Published as part of Lee, Seung-Gyu & Ahn, Kee-Jeong, 2017, A taxonomic review of the Korean species of the subgenus Datomicra Mulsant & Rey of the genus Atheta Thomson, with description of a new species (Coleoptera, Staphylinidae, Aleocharinae), pp. 508-522 in Zootaxa 4268 (4) on pages 511-512, DOI: 10.11646/zootaxa.4268.4.3, http://zenodo.org/record/580926