Liogluta changwhani Lee and Ahn

Lee, Seung-Gyu & Ahn, Kee-Jeong, 2016, A taxonomic review of Korean Liogluta Thomson (Coleoptera, Staphylinidae, Aleocharinae) with descriptions of three new species, Zootaxa 4193 (2), pp. 285-303 : 286-290

Liogluta changwhani Lee and Ahn , sp. nov.

( Figs. 1 A, 2–3)

Description. Length 2.5–2.8 mm. Body ( Fig. 1 A) parallel-sided; surface fairly glossy and densely pubescent, with microsculpture. Body dark brown to black; head almost black; pronotum and abdomen darker than elytra; legs paler, yellowish brown. Head. Subquadrate, about 1.0–1.1 times as wide as long, widest across eyes, slightly narrower than pronotum; eyes large and prominent, about 1.4–1.5 times as long as temples; gular sutures moderately separated, more or less diverged basally; infraorbital carina complete; cervical carina complete. Antennae ( Fig. 3 A) long and slender; antennomeres 1–3 elongate, 1 longest, 2 about as long as 3, 4–10 subquadrate to slightly transverse, 11 longer than wide, about as long as preceding two combined. Mouthparts. Labrum ( Fig. 2 A) transverse, slightly emarginate in anterior margin, with ε-sensillum and about 9–10 macrosetae on each side of midline; epipharynx ( Fig. 2 B) with several sensilla, including 2 lateral sensory rows on each side of midline; αsensillum long and setaceous, about 2.0 times as long as ε-sensillum, β-sensillum short, convergent apically, γsensillum reduced. Mandibles ( Figs. 2 C–D) asymmetrical, subtriangular, decurved and pointed apically, about 1.5–1.6 times as long as basal width; minute denticles present in molar region; right one ( Fig. 2 C) with small internal tooth, internal margin slightly serrulate; prostheca developed, composited three portions, second portion slightly longer. Galea and lacinia of maxilla ( Fig. 2 E) long and slender; lacinia having seven spines in distal comb region, contiguous with two isolated spines; maxillary palpus elongate, with pubescence and long setae; palpomere 1 smallest, 2 about 2.8–3.0 times as long as wide, 3 slightly longer than 2, about 2.7–2.9 times as long as wide, 4 digitiform, filamentous sensilla reaching to basal half. Labium ( Fig. 2 F) with ligula divided into 2 lobes in basal half; prementum with two medial setae widely separated; two basal pores narrowly separated, about 1.0–2.0 times width of basal pore; several medial pseudopores, 1 setal pore and 2 real pores present on each side of midline; labial palpus with many setulae; palpomere 1 largest, about 2.0 times as long as wide, γ-setula contiguous with bseta, 2 shortest, about 1.4–1.6 times as long as wide, 3 subparallel-sided, slightly shorter than 1, about 3.0–3.5 times as long as wide. Mentum ( Fig. 2 F) trapezoidal, anterior margin emarginate; v-seta short, close to u-seta.

Thorax. Pronotum slightly transverse, approximately 1.3 times as wide as long, widest in apical third; hypomera fully visible in lateral aspect. Metanotal scutum with 1 long seta and about 4–5 relatively short setae on each side of midline. Mesocoxal cavities narrowly separated, mesoventral process pointed at apex, slightly longer than isthmus and metaventral process combined; isthmus slightly longer than metaventral process. Elytra longer and slightly wider than pronotum; elytron approximately 1.5–1.6 times as long as wide, pubescence directed posteriorly and postero-laterally; postero-lateral margin almost straight; hind wings fully developed, flabellum composed of about 5–6 long setose lobes. Legs. Slender and long, with pubescence and macrosetae; meso- and metatibiae with different length of two spurs at apex; tarsal formula 4-5-5, length ratio of tarsomeres 25:27:30:67 (protarsus); 31:36:38:39:68 (mesotarsus); 48:46:44:42:80 (metatarsus); one empodial seta present, about as long as claw. Abdomen. Parallel-sided; surface distinctly glossy and densely pubescent, with reticulate microsculpture; macrochaetal arrangement of tergites II–VI 01-21-13 -13-13; male tergite VIII ( Fig. 3 B) with 4 macrosetae on each side of midline; broad process present in median region and posterior margin crenate; male sternite VIII ( Fig. 3 C) with 9 macrosetae on each side of midline, posterior margin slightly convex, subtriangular, with long marginal setae; posterior margin of female tergite VIII ( Fig. 3 D) subtruncate; female sternite VIII ( Fig. 3 E) with 7 macrosetae, posterior margin slightly emarginate in median region, with conspicuous marginal setae and minute setae. Aedeagus. Median lobe ( Figs. 3 F–G) narrowly ovate and widest in basal fourth, apical process elongate and convergent at apex in ventral aspect; internal sac developed. Apical lobe of paramerites ( Fig. 3 H) with four setae; a-seta slightly longer than b- and d-setae subequal in length, c-seta very short and close to d-seta. Spermatheca. Bursa dilated apically and conical shaped umbilicus; duct loosely coiled ( Fig. 3 I).

Type material. Holotype, ♂, labeled as follows: ‘ KOREA: Chungnam Prov., Daejeon-si, Seo-gu, Jangandong , Mt. Jangtaesan , N36°13′03.3″ E127°20′36.2″ 258 m, 28 III 2012, DH Lee, TK Kim, SG Lee ; HOLOTYPE Liogluta changwhani Lee and Ahn 2016 ’. Desig. S.-G. Lee and K.-J. Ahn 2016. Paratypes, 40 exx. (total): 19 exx. (one on slide), same data as Holotype; 21 exx. (two on slide), Korea. Gyeongbuk prov., Yongjang-ri, Naenammyeon , Gyeongju-si , ex FIT 21.V-26.VI.2007, YB Cho coll. E129°12′42.9″ N35°46′19.5″.

Material examined. SOUTH KOREA: Chungnam prov.: 11 exx. (five in 95% ETOH), Daejeon-si, Seo-gu , Jangan-dong , Jangtaesan Recreational Forest , N36°13′4.32″ E127°20′34.44″ 257m, 17 III 2011, IS Yoo, YH Kim, SG Lee, leaf litters.

Distribution. Korea (South).

Remarks. Adults are similar to those of L. pyonganica , but can be distinguished by the characters provided in the key and different shape and structure of aedeagus and spermatheca.

Etymology. Named after the late professor Chang-Whan Kim in honor of his pioneering research on Korean insects.

Figures

FIGURE 1. Habitus of Liogluta. A, L. changwhani sp. nov.; B, L. distans; C, L. granigera; D, L. infans. E, L. jinilli sp. nov.; F, L. pyonganica; G, L. rufescens sp. nov.; H, L. ursi.

FIGURE 2. Mouthparts of Liogluta changwhani sp. nov. A, labrum (dorsal aspect); B, epipharynx (ventral aspect); C, right mandible (dorsal aspect); D, left mandible (ventral aspect); E, left maxilla (ventral aspect); F, labium (ventral aspect).

FIGURE 3. Liogluta changwhani sp. nov. A, antenna; B, male abdominal tergite VIII (dorsal aspect); C, male abdominal sternite VIII (ventral aspect); D, female abdominal tergite VIII (dorsal aspect); E, female abdominal sternite VIII (ventral aspect); F, median lobe of aedeagus (lateral aspect); G, median lobe of aedeagus (ventral aspect); H, paramere (lateral aspect); I: spermatheca. Scales = 0.1 mm.