Atheta (Microdota) pasniki Lee & Ahn

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 : 74-76

Taxon classification Animalia Coleoptera Staphylinidae

Atheta (Microdota) pasniki Lee & Ahn sp. n. Figs 10, 22-27, 33, 42, 51, 60, 69, 78

Material examined.

Holotype, labeled as follows: 'KOREA: Gangwon Prov., Pyeongchang-gun, Jinbu-myeon, Dongsan-ri, Mt. Odaesan, Sangwonsa, 4 VI 2001, S.-J. Park, ex sifting, HOLOTYPE Atheta (Microdota) pasniki Lee and Ahn, Desig. S.-G. Lee and K.-J. Ahn 2015' Deposited in CNUIC, Daejeon. Paratypes, 40 exx. (total); 5 exx., same data as holotype; 8 exx., same data as holotype except ' N37°47.074' E128°33.735', 15 V 2006, S.-J. Park, Y.-H. Kim, ex near stream’; 4 exx., same data as holotype except ' N37°47.104' E128°33.57.2', 10 V 2007, TK Kim, sifting’; 2 exx., same data as holotype except '8 V 2004,S.J.Park, D.H. Lee, S. M. Choi ex sifting; 1 ex., same data as holotype except '25 - 26 IV 2001, K.-J. Ahn, ex sifting’; 2 exx., Gangwon Prov., Pyeongchang-gun, Mt. Odaesan, Sangwonsa, 26 IV 2001, M.-J. Jeon’; 1 ex., same data as former except 'S.-J. Park, ex near stream; 8 exx., same data as the former except '25 V 2004, S J Park, J S Park, ex sifting; 1 ex., Gangwon Prov., Hongcheon-gun, Nae-myeon, Mt. Gyebangsan, Unduryeong, N37°42.49.9' E128°26.40.5', 1100m, 11 V 2007, TK Kim, ex leaf litter near stream; 5 exx., Kangwon Prov., Inje-gun, Yongdaeri, 13 IX 1998, K.-J. Ahn, K.-L. You, H.-J. Lim, ex leaf litter.

Description.

Length 1.7-2.3 mm. Body (Fig. 10) parallel-sided, more or less flattened dorso-ventrally; surface glossy, densely pubescent, with fine microsculpture. Body usually reddish brown; elytra paler than other parts; legs yellowish brown. Head. Subcircular, approximately 1.0-1.1 times wider than long, widest behind eyes, slightly narrower than pronotum; eyes small, about 0.8 times longer than tempora; gular sutures moderately separated, diverged basally; infraorbital carina incomplete; cervical carina complete. Antennae (Fig. 33) dilated apically; antennomeres 1-3 elongate, 1 longest, 4-10 transverse, 11 longer than wide, about as long as preceding two combined. Mouthparts. Labrum (Fig. 22) transverse, anterior margin emarginate; two lateral sensilla and about 8 macrosetae present on each side of midline; α-sensillum long and setaceous, more than twice longer than ε-sensillum, β- and γ-sensilla reduced; epipharynx as in Fig. 23. Mandibles asymmetrical, pointed apically, about 1.6-1.7 times as long as basal width; right one (Fig. 24) 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 1.7-1.8 times as long as wide, 2 about 2.3-2.5 times longer than wide, 3 longer than 2, about 2.2-2.4 times as long as wide, 4 digitiform, filamentous sensilla not reaching to basal half (Fig. 25). Labium (Fig. 26) with ligula divided into two lobes in basal half; two medial setae contiguous; two basal pores closed together; 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 1.4-1.6 times longer than wide, with γ-setula close f-setula, 2 shortest, about 1.5-1.7 times longer than wide, 3 about as long as 1, about 2.2-2.4 times longer than wide. Mentum (Fig. 27) trapezoidal, anterior margin emarginate, v-seta relatively long. Thorax. Pronotum transverse, approximately 1.3 times wider than long, widest at apical third; pubescence directed anteriorly. Metanotal scutum with one long seta and about two short setae on each side of midline; mesocoxal cavities narrowly separated, mesoventral process pointed at apex, about as long as isthmus and metaventral process combined. Elytra relatively short, transverse, 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 one setose lobe. Legs. Slender and long, with dense pubescence and setae; tibia with two spurs at apex; length ratio of tarsomeres 19:20:22:57 (protarsus); 22:25:26:26:53 (mesotarsus); 31:33:33:33:68 (metatarsus); one empodial seta present, very short. Abdomen. Subparallel-sided, widest at middle; surface glossy and densely pubescent, with fine and imbricate microsculpture; macrochaetal arrangement of tergites II–VI 01-02-12-12-13; male tergite VIII (Fig. 42) with 4 macrosetae on each side of midline, posterior margin subtruncate; male sternite VIII with 7 macrosetae on each side of midline, posterior margin convex, subtriangular, with marginal setae; posterior margin of female tergite VIII truncate; posterior margin of female sternite VIII slightly emarginate at middle, with long and short marginal setae; minute setae present in median region. Genitalia. Median lobe (Figs 51, 60) oval; apical process parallel-sided, convergent at apex in ventral aspect. Apical lobe of paramerites (Fig. 69) elongate and parallel-sided with four setae, subequal in length. Spermatheca (Fig. 78) with large bursa and small umbilicus; duct relatively short, one coiled apically.

Distribution.

Korea (South).

Remarks.

This species is similar to Atheta (Microdota) nakanei , but can be distinguished by shape and structure of internal sac of aedeagus. They were usually collected near streams or in moist regions of forest of Gangwon province by sifting litter.

Etymology.

Named after Grzegorz Paśnik in honor of his research on Korean Athetini .