Liogluta jinilli Lee & 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 : 294-295

Liogluta jinilli Lee & Ahn , sp. nov.

( Figs. 1 E, 5–6)

Description. Length 2.5–2.7 mm. Body ( Fig. 1 E) parallel-sided; surface fairly glossy and densely pubescent, with microsculpture. Body reddish black to black; head and abdomen darker than other parts, almost black; antennae and legs paler, reddish brown. Head. Subquadrate, about 1.0–1.1 times as wide as long, widest across eyes, slightly narrower than pronotum; eyes moderate in size and slightly prominent, about 1.0–1.2 times as long as temples; gular sutures moderately separated, more or less diverged basally; infraorbital carina almost complete; cervical carina complete. Antennae ( Fig. 6 A) long and slender; antennomeres 1–3 elongate, 1 longest, 2 slightly longer than 3, 4 about as long as wide, 5–10 subquadrate to slightly transverse, 11 longer than wide, about as long as preceding two combined. Mouthparts. Labrum ( Fig. 5 A) transverse, slightly emarginate in anterior margin, with ε-sensillum and about 8–9 macrosetae on each side of midline; epipharynx ( Fig. 5 B) with several sensilla, including 2 lateral sensory rows on each side of midline; α-sensillum long and setaceous, about 2.0 times as long as ε-sensillum, β- and c-sensilla very short. Mandibles ( Figs. 5 C–D) asymmetrical, subtriangular, decurved and pointed apically, about 1.6–1.7 times as long as basal width; minute denticles present in molar region; right one ( Fig. 5 C) with small internal tooth, internal margin slightly serrulate; prostheca developed, composited three portions. Galea and lacinia of maxilla ( Fig. 5 E) long and slender; lacinia composited seven spines in distal comb region, contiguous with two isolated spines; maxillary palpus elongate, with pubescence and long setae; palpomere 1 smallest, 2 about 2.6–2.8 times as long as wide, 3 slightly longer than 2, about 2.6–2.8 times as long as wide, 4 digitiform, filamentous sensilla reaching to basal half. Labium ( Fig. 5 F) with ligula relatively short, divided into 2 lobes in basal half; prementum with two medial setae widely separated; two basal pores moderately separated, about 2.0–3.0 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 1.8–2.0 times as long as wide, γ-setula contiguous with b-seta, 2 shortest, about 1.4–1.6 times as long as wide, 3 subparallel-sided, about as long as 1, about 3.5 times as long as wide. Mentum ( Fig. 5 F) trapezoidal, anterior margin almost straight; v-seta short, close to u-seta. Thorax. Pronotum slightly transverse, approximately 1.2–1.3 times as wide as long, widest in apical third; hypomera fully visible in lateral aspect. Metanotal scutum with 2 long setae and about 2–4 relatively short setae on each side of midline. Mesocoxal cavities narrowly separated, mesoventral process slightly pointed at apex, length ratio of mesoventral process, isthmus and metaventral process 16:9:5. Elytra longer and slightly wider than pronotum; elytron approximately 1.6 times as long as wide, pubescence directed posteriorly and postero-laterally; posterolateral margin slightly sinuate; hind wings fully developed, flabellum composed of about 7–9 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 27:30:33:68 (protarsus); 35:39:39:36:70 (mesotarsus); 52:53:51:50:87 (metatarsus); one empodial seta present, slightly shorter than claw. Abdomen. Parallel-sided; surface distinctly glossy and densely pubescent, with transversely reticulate microsculpture; macrochaetal arrangement of tergites II–VI 01-12-22 -23-23; male tergite VIII ( Fig. 6 B) with 4 macrosetae on each side of midline, posterior margin subtruncate; male sternite VIII ( Fig. 6 C) with 9 macrosetae on each side of midline, posterior margin round, with long marginal setae; posterior margin of female tergite ( Fig. 6 D) VIII subtruncate; female sternite VIII ( Fig. 6 E) with 7 macrosetae on each side of midline, posterior margin more or less triangularly convex, with conspicuous marginal setae, minute setae present in median region. Aedeagus. Median lobe ( Figs. 6 F–G) ovate and widest at middle, apical process broad and subtriangular, convergent at apex in ventral aspect; internal sac developed. Apical lobe of paramerites ( Fig. 6 H) with four setae; a-seta longest, slightly longer than bseta, c- and d-setae short and subequal in length, contiguous and positioned at apex. Spermatheca. Bursa round at apex, with broad umbilicus; duct slightly sinuate, shortly coiled at apex ( Fig. 6 I).

Type material. Holotype, ♂, labeled as follows: ‘ KOREA: Gangwon Prov., Pyeongchang-gun, Jinbu-myeon, Mt. Odaesan , Sangwonsa , N37°47'10" E128°33'57.2" 10 V 2007, TK Kim, sifting ; HOLOTYPE Liogluta jinilli Lee and Ahn 2016 ’. Desig. S.-G. Lee and K.-J. Ahn 2016. Paratypes, 10 exx. (two on slide), same data as Holotype.

Distribution. Korea (South).

Remarks. This species is similar to L. changwhani sp. nov. and L. pyonganica , but can be distinguished by the characters provided in the key and different shape and structure of aedeagus.

Etymology. Named after the late professor Jin Ill Kim in honor of his pioneering research on Korean beetles.

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 5. Mouthparts of Liogluta jinilli 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 6. Liogluta jinilli 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.