Acrotona (Acrotona) setaria ( Brundin, 1952 )

Lee, Seung-Gyu & Ahn, Kee-Jeong, 2018, A taxonomic review of Korean Acrotona Thomson with a description of new species (Coleoptera, Staphylinidae, Aleocharinae), Zootaxa 4418 (3), pp. 247-263 : 258

Acrotona (Acrotona) setaria ( Brundin, 1952)

( Fig. 1E )

Atheta setaria Brundin, 1952: 124 .

Acrotona setaria: Paśnik, 2001: 204 ; Smetana, 2004: 365.

Acrotona (Acrotona) setaria: Schülke & Smetana, 2015: 510 ; Ahn et al., 2017: 292.

Description. Length about 2.0 mm. Body ( Fig. 1E ) surface glossy and densely pubescent, with fine microsculpture. Body brown to dark brown; head and abdomen darker than other parts; elytra and legs paler. Head. Circular, about as wide as long, widest at middle, distinctly narrower than pronotum; eyes large and slightly prominent, about 1.3–1.4 times as long as temples; gular sutures moderately separated, diverged basally. Antennae long and slender, longer than head and pronotum combined; antennomeres compactly close together, 1–3 elongate, 1 about as long as 11, 2 about as long as 3, 4 quadrate, 5–10 subquadrate to slightly transverse, 11 longest, about as long as preceding two combined. Thorax. Pronotum approximately 1.4 times as wide as long, widest in basal third to half, pubescence directed posteriorly in midline. Elytra slightly transverse, slightly wider than pronotum; elytron approximately 1.4–1.5 times as long as wide, pubescence directed posteriorly and postero-laterally; postero-lateral margin slightly sinuate; hind wings fully developed. Legs. Slender and long, with pubescence and macrosetae; tibiae with two spurs at apex. Abdomen. Widest in segments III–IV; surface glossy and densely pubescent; tergites III–IV impressed, V slightly impressed in basal region; male tergite VIII with four macrosetae on each side of midline, posterior margin subtruncate; posterior margin of male sternite VIII broadly round, with about six macrosetae in median region. Aedeagus. Median lobe elongate, apical process elongate and straight, about as long as basal portion in lateral aspect ( Brundin, 1952: fig. 44).

Material examined. NORTH KOREA: 1♂, Corea spet. 1983 Myohyangsan Mts. Exp. Inst.Zool.Cr. [North Korea, Pyeonganbuk Prov., Mt. Myohyangsan, 1983, ISEA] .

Distribution. Korea (North), Mongolia and Turkmenia.

Remarks. This species was recorded in North Korea by Paśnik (2001) and no specimen has been collected in South Korea. We could not describe the mouthparts in detail because no specimen was available for dissection.

Figures

FIGURE 1. Habitus. A, Acrotona (Acrotona) aterrima; B, A. (A.) koreana sp. nov.; C, A. (A.) lutulenta; D, A. (A.) pseudotenera; E, A. (A.) setaria; F, A. (A.) suspiciosa suspiciosa; G, A. (A.) vicaria.