Amischa koreana Lee & Ahn 2023, sp. nov.
Creators: name: Lee, Seung-Gyu
name: Ahn, Kee-Jeong
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Amischa
Amischa koreana

description: Amischa koreana Lee & Ahn, sp. nov.
(Figs. 1C, 3A–F, 4A–H, 5A–F, 6A–E)
Description. Length 1.6–1.8 mm. Body (Fig. 1C) subparallel-sided; surface slightly glossy and densely pubescent, with microsculpture. Body reddish yellow to reddish brown; basal antenna and leg paler and yellowish; apical segments of abdomen paler than other segments. Head (Fig. 4A). Subtriangular with broad neck, approximately 1.0–1.1 times as wide as long, widest behind eyes, narrower than pronotum; eyes moderate in size and slightly prominent, about as long as temples; gular sutures moderately separated; infraorbital carina absent; cervical carina absent. Antenna (Fig. 4B) relatively short and slender; antennomeres 1–3 elongate, 1 longest and slightly longer than 2, 3 distinctly shorter than 2, 4–10 subquadrate to slightly transverse, slightly 11 shorter than wide and about as long as preceding two combined. Mouthparts. Labrum (Fig. 3A) transverse, slightly emarginate in anterior margin, with ε-sensillum and about 8 macrosetae on each side of midline; epipharynx (Fig. 3B) with several sensilla, including 2 lateral sensory rows on each side of midline; α-sensillum short, about as long as ε-sensillum and slightly shorter than lateral sensory rows; β and γ-sensilla reduced. Mandibles (Figs. 3C–D) asymmetrical, subtriangular, decurved and pointed apically, about 1.5–1.6 times as long as basal width; right one (Fig. 3C) with small internal tooth, internal margin slightly serrulate; prostheca developed, composited three portions, second portion slightly longer. Galea and lacinia of maxilla (Fig. 3E) long and slender; lacinia composited seven spines in distal comb region, two isolated spines present; last spine of distal comb region and isolated spines close together; maxillary palpus elongate and pubescent; palpomere 1 smallest, 2 about 2.8–3.0 as long as wide, 3 slightly longer than 2, about 2.3–2.5 times as long as wide, 4 short, filamentous sensilla reaching to basal half. Labium (Fig. 3F) with ligula slightly convex apically; prementum with two medial setae widely separated; two basal pores widely distant, more than 5.0 times width of basal pore; several medial pseudopores, 1 setal pore and 2 real pores present on each side of midline; labial palpus elongate, with many setulae; palpomere 1 largest, about 1.6–1.8 times as long as wide, with γ-setula close to b-seta, 2 shortest, about 1.2–1.4 times as long as wide, 3 narrowly long and about as long as 1, about 3.5–4.0 times as long as wide. Mentum (Fig. 3F) trapezoidal, anterior margin slightly emarginate; v-seta short, close to u-seta. Thorax. Pronotum (Fig. 4C) approximately 1.2 times as wide as long, widest in about middle. Metanotal scutum (Fig. 4E) with 1 long seta and about 1 short seta on each side of midline. Mesocoxae narrowly separated; mesoventral process (Fig. 4F) pointed at apex, reaching to middle of mesocoxae; mesocoxal cavities unmargined. Elytra slightly longer and wider than pronotum; elytra (Fig. 4H) approximately 1.5–1.6 times as long as wide, pubescence directed posteriorly and postero-laterally, postero-lateral margin sinuate; hind wings fully developed, flabellum composed of about 2 setose lobes. Leg slender and long, with dense pubescence and macrosetae; middle and hind tibiae with different length of two spurs at apex; tarsal formula 4-5-5, length ratio of tarsomeres 17:19:20:42 (front tarsus); 20:22:22:21:36 (middle tarsus); 31:32:29:25:43 (hind tarsus); one empodial seta present, shorter than claw. Abdomen. Parallel-sided; surface glossy and densely pubescent, with fine and imbricate microsculpture (Fig. 5A); macrochaetal arrangement of tergites II–VI 01-02-02-12 (or 02)-12; male tergite VIII (Fig. 6A) with 4 long macrosetae on each side of midline, posterior margin subtruncate; male sternite VIII (Fig. 6B) with about 7 long macrosetae on each side of midline, posterior margin convex, slightly rounded, with inconspicuous and long marginal setae; posterior margin of female tergite VIII (Fig. 5B) truncate; female sternite VIII (Fig. 5C) with about 6 long macrosetae on each side of midline, posterior margin (Fig. 5D) truncate in median region, with about 10 marginal setae conspicuous and relatively short. Aedeagus. Median lobe narrowly ovate; apical process slightly bent and pointed at apex in lateral aspect (Fig. 6C); pointed at apex in ventral aspect; distal crest short. Paramere (Fig. 6D) narrow; condylite short; apical lobe of paramerite pointed at apex and with 4 setae, d-seta very long, other setae short and subequal in length. Spermatheca. Bursa elongate, with large umbilicus; duct shortly coiled at apex (Figs. 5F, 6E).
Type Material. Holotype, labeled as follows: ‘ KOREA: Gyeongbuk Prov., Uljin-gun, Seo- myeon, N36˚57'18.9" E129˚17'27.3" 141 m, 23 vii 2010, TK Kim, YH Kim, JH Jeon, leaf litters \ HOLOTYPE Amischa koreana Lee & Ahn Desig. S. - G. Lee and K.-J. Ahn 2022’ [CNUIC]. Paratypes, 4 exx., same data as holotype (two on slide) [CNUIC].
Distribution. Korea (South).
Remarks. Amischa koreana is similar to A. bifoveolata, but can be distinguished by the characters provided in the key and the different external form and internal structure of the aedeagus (narrower median lobe and paramere and shaper apical process of median lobe) and the different shape of spermatheca.
description: Published as part of Lee, Seung-Gyu & Ahn, Kee-Jeong, 2023, Korean species of the genus Amischa Thomson (Coleoptera: Staphylinidae Aleocharinae), with a description of new species, pp. 478-488 in Zootaxa 5230 (4) on pages 482-487, DOI: 10.11646/zootaxa.5230.4.5, http://zenodo.org/record/7564103