Atheta (Dimetrota) machonryongica Pasnik 2001
Creators: name: Lee, Seung-Gyu
name: Ahn, Kee-Jeong
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Atheta
Atheta machonryongica

description: Atheta (Dimetrota) machonryongica Paśnik, 2001
(Figs. 1A, 2A–I, 8E)
Atheta (Dimetrota) machonryongica Paśnik, 2001: 222; Smetana, 2004: 382; Schülke & Smetana, 2015: 532.
Description. Length 2.5–3.2 mm. Body (Fig. 1A) dark brown to black; head, pronotum and abdomen almost black; elytra and legs paler than other parts. Head. Slightly transverse, approximately 1.1–1.2 times as wide as long, widest across eyes, slightly 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. 2A) long and slender; antennomeres 1–3 elongate, 1 longest, 2 about as long as 3, 4–10 quadrate to subquadrate, 11 about as long as 1, about as long as preceding two combined. Mouthparts. Labrum with 9–10 macrosetae on each side of midline; epipharynx with α-sensillum long and setaceous, about 3.0 times as long as ε-sensillum; β- and γ-sensilla short. Mandibles asymmetrical, subtriangular, decurved and pointed apically, about 1.5–1.6 times as long as basal width; very few small denticles present in molar region; right one with small internal tooth, internal margin slightly serrulate; prostheca developed, composed of three portions, second portion slightly longer. Galea and lacinia of maxilla long and slender; maxillary palpus elongate and pubescent; palpomere 1 smallest, 2 about 2.5–2.7 times as long as wide, 3 slightly longer than 2, about 2.6–2.8 times as long as wide, 4 digitiform, filamentous sensilla not reaching to basal half. Prementum with two medial setae narrowly separated; two basal pores close together; several medial pseudopores, lateral pseudopores, 1 setal pore and 2 real pores present on each side of midline; labial palpomere 1 largest, about 1.5–1.7 times as long as wide, γ-setula contiguous with b-seta, 2 shortest, about 1.4–1.6 times as long as wide, 3 more or less dilated apically and about as long as 1, about 3.0–3.5 times as long as wide. Mentum trapezoidal, anterior margin slightly emarginate; v-seta relatively long, close to u-seta. Thorax. Pronotum approximately 1.3–1.4 times as wide as long, widest in apical third to half. Metanotal scutum with 1 long seta and about 2–10 relatively short setae on each side of midline. Mesoventral process more or less pointed at apex, distinctly longer than isthmus and metaventral process combined. Elytra slightly longer and wider than pronotum; elytron approximately 1.6–1.7 times as long as wide; hind wings fully developed, flabellum composed of about 6–8 long setose lobes. Legs. Length ratio of tarsomeres 25:29:32:78 (protarsus); 28:36:37:33:78 (mesotarsus); 44:48:47:42:85 (metatarsus). Abdomen. Surface glossy and densely pubescent, with transverse microsculpture; macrochaetal arrangement of tergites II–VI 02-13-13 (or 23)-13 (or 23)-13 (or 23); male sternite VII with moderately many granular punctures in posterior margin; male tergite VIII (Fig. 2B) with 4 macrosetae on each side of midline, posterior margin with broad process, emarginate in median region and pointed in postero-lateral regions; male sternite VIII (Fig. 2C) with 8 macrosetae on each side of midline, posterior margin convex, with inconspicuous marginal setae; posterior margin of female tergite VIII (Fig. 2D) truncate in median region; female sternite VIII (Fig. 2E) with 7 macrosetae on each side of midline, posterior margin truncate, with conspicuous and moderately long marginal setae, robust minute setae present in median region. Aedeagus. Median lobe (Figs. 2F–G) narrowly ovate, apical process pointed apically in ventral aspect. Apical lobe of paramerites (Fig. 2H) subparallel-sided, with 4 setae; a-seta longest, b-seta slightly longer than c- and d-setae. Spermatheca. Bursa with large umbilicus; duct recurved, deflected at apex (Fig. 2I).
Type material. Holotype, ♂, labeled as in Fig. 8E.
Material examined. SOUTH KOREA: Chungbuk Prov.: 1 ex., Danyang-gun, Mt. Sobaeksan, Cheongdong, 7–9 v 1999, US Hwang, HJ Kim, FIT. Chungnam Prov.: 5 exx., Buyeo-gun, Naesan-myeon, Mt. Wolmyeongsan, Geumjisa, 3 v–1 vi 2000, US Hwang, HJ Kim, FIT; 5 exx., Nonsan-si, Beolgok-myeon, Mt. Daedunsan, Surak-valley, 2–10 V 2000, US Hwang, SJ Park, HJ Kim, FIT. Gangwon Prov.: 1 ex., Hwacheon-gun Mt. Hwaaksan, 11–12 ix 1998, KL You, KJ Ahn, mushroom; 5 exx., Inje-gun, Sangnam-myeon, Bangtaesan, 18 viii 2000, MH Kim, mushroom; 4 exx., Pyeongchang-gun, Jinbu-myeon, Dongsan-ri, Mt. Odaesan, Sangwonsa, 30 iv–4 vi 2001, KJ Ahn, SJ Park, MS Kim, MJ Jeon, FIT; 12 exx., same data as former except for ‘ 4–22 vi 2001 ’; 6 exx., same data as former except for ‘ 22 vi–16 viii 2001, SJ Park, CW Shin ’; 1 ex., same data as former except for ‘ 16 viii–15 ix 2001 ’; 2 ex., same data as former except for ‘ 18 vi–22 vii 2004, SJ Park, KM Yang, DH Lee, FIT’; 4 exx., same data as former except for ‘ 18 vi 2004, SJ Park, FIT’; 1 ex., same data as former except for ‘ 30 viii 2006, YH Kim’; 2 exx., same data as former except for ‘Woljeongsa, 22 viii–20 x 2000, KJ Ahn’; 1 ex., same data as former except for ‘Bukdaesa, 23 viii 2000, MH Kim, mushroom’; 4 exx., Pyeongchang-gun, Mt. Odaesan, Jeokmyeolbogung, 7–9 x 1999, US Hwang, MS Kim, FIT; 2 exx., Pyeongchang-gun, Cheondong-ri, Mt. Sambangsan, 13 vii–15viii 2001, KJ Ahn, SJ Park, SW Shin, FIT in Pinus forest; 6 exx., Inje-gun, Mt. Jeombongsan, Gombaeryeong, 23–30 viii 1999, US Hwang, bait trap. Gyeongnam Prov.: 6 exx., Habcheon-gun, Haeinsa, 4 x 1986; Gyeonggi Prov.: 2 exx., Seoulsi, Jungnang-gu, Mt. Yongmasan, 1 vi 1986, YS Kim; 1 ex., Yongmunsan, Jogaegol, 31 v 1986. Jeonnam Prov.: 2 exx., Gurye-gun, Mt. Jirisan, Piagol, 24 v 2000, HJ Kim, MJ Jeon, sifting’.
Distribution. Korea (South, North).
Remarks. This species was described by Paśnik (2001) from North Korea and is recorded here for the first time in South Korea, and some specimens were collected from mushroom in forest.
description: Published as part of Lee, Seung-Gyu & Ahn, Kee-Jeong, 2022, Korean species of the Atheta Thomson subgenus Dimetrota Mulsant & Rey (Coleoptera: Staphylinidae: Aleocharinae) with a description of new species, pp. 401-416 in Zootaxa 5138 (4) on pages 403-406, DOI: 10.11646/zootaxa.5138.4.3, http://zenodo.org/record/6571540