Atheta (Dimetrota) machonryongica Paśnik, 2001

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, Zootaxa 5138 (4), pp. 401-416 : 403-406

publication ID	https://doi.org/ 10.11646/zootaxa.5138.4.3
publication LSID	lsid:zoobank.org:pub:4BC0006F-A77B-4ED3-AF51-C48C4CEB9702
DOI	https://doi.org/10.5281/zenodo.6574062
persistent identifier	https://treatment.plazi.org/id/5E7F7A4A-C753-FF9E-43AD-B9B36160FC8D
treatment provided by	Plazi
scientific name	Atheta (Dimetrota) machonryongica Paśnik, 2001
status

Treatment

Atheta (Dimetrota) machonryongica Paśnik, 2001 View in CoL

( Figs. 1A View FIGURE 1 , 2A–I View FIGURE 2 , 8E View FIGURE 8 )

Atheta (Dimetrota) machonryongica Paśnik, 2001: 222 View in CoL ; Smetana, 2004: 382; Schülke & Smetana, 2015: 532.

Description. Length 2.5–3.2 mm. Body ( Fig. 1A View FIGURE 1 ) 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 View FIGURE 2 ) 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 View FIGURE 2 ) 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 View FIGURE 2 ) with 8 macrosetae on each side of midline, posterior margin convex, with inconspicuous marginal setae; posterior margin of female tergite VIII ( Fig. 2D View FIGURE 2 ) truncate in median region; female sternite VIII ( Fig. 2E View FIGURE 2 ) 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 View FIGURE 2 ) narrowly ovate, apical process pointed apically in ventral aspect. Apical lobe of paramerites ( Fig. 2H View FIGURE 2 ) 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 View FIGURE 2 ).

Type material. Holotype, ♂, labeled as in Fig. 8E View FIGURE 8 .

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.