Archaeoboreaphilus macrothorax Kim and Ahn, 2012

Kim, Tae-Kyu & Ahn, Kee-Jeong, 2012, Descriptions of two new species and a key to the species of Archaeoboreaphilus Zerche (Coleoptera: Staphylinidae: Omaliinae), Journal of Natural History (J. Nat. Hist.) 46 (41 - 42), pp. 2509-2517 : 2514-2516

Archaeoboreaphilus macrothorax Kim and Ahn sp. nov.

( Figures 1B , 2 D–F, 3D–G, 4C,D)

Description

Body ( Figure 1B ) length 3.7–3.8 mm, parallel-sided, depressed above, covered with coarse punctures and golden pubescence, brownish black to black and glossy. Head subglobular, slightly broad, about 1.05 times as wide as long; eye protruding, as long as temple; antennae ( Figure 2D ) threadlike, pubescent, reaching anterior third of elytra; scape oval and robust, about 2.0 times as long as wide; pedicel to antennomere 10 subtrapezoidal, width of antennomeres 2–6 almost same, antennomeres 6–10 getting slightly wider; pedicel about 2.44 times as long as wide, 0.6 times as wide and 0.73 times as long as scape; antennomere 3 about 2.78 times as long as wide, 1.14 times as long as pedicel; antennomere 7 about 2.32 times as long as wide; antennomere 8 about 2.1 times as long as wide; antennomere 9 about 2.0 times as long as wide; antennomere 11 longest, 3.81 times as long as wide; gular sutures parallel, gular plate narrow, 0.10 times as wide as head; postgena well convex. Pronotum ( Figure 2E ) subhexagonal and convex, covered with coarse punctures, widest in anterior third, anterior third of midline depressed, middle area longitudinally elevated, U-shaped depression present behind medial elevation, lateral margins weakly crenulate, post-lateral margin clearly emarginate, 1.11 times as wide as long, almost as wide as and 0.94 times as long as head. Elytra ( Figure 2F ) unicolour, dilated posteriorly, punctured coarsely, 1.03 times as long as wide, 1.50 times as wide and 1.71 times as long as pronotum. A pair of wing folding patches present on tergites IV and V; posterior margin of tergite VII with apical fringe.

Male. Front tarsus broad. Medial posterior area of sternite VII depressed with numerous obtuse macro setae, posterior margin shallowly emarginate ( Figure 3D ); anterior margin of tergite VIII deeply sinuate, posterior margin slightly emarginate ( Figure 3E ); anterior projection of sternite VIII wider than half of sternite, posterior margin emarginate ( Figure 3F ); sternite IX ( Figure 3G ) narrow, posterior third of lateral margin almost parallel, basal part of dorsal surface with short longitudinal carina, apical area pubescent with two long setae. Median lobe of aedeagus slender and weakly sinuate, narrowed apically, apex of median lobe upturned strongly ( Figure 4C,D ); parameres parallel, almost as long as median lobe, a little longer than basal bulb, posterior quarter somewhat constricted ( Figure 4D ).

Type series

Holotype, ♂: ‘ KOREA: Gangwon Prov., Pyeongchang-gun, Jinbu-myeon, Mt Odaesan , Sangwonsa , 37 ◦ 47 ′ 8.6" N, 128 ◦ 33 ′ 56.2" E, 880 m, 16 April 2008, YH Kim, sifting flood debris . Holotype, Archaeoboreaphilus macrothorax Kim and Ahn, Desig. T. -K. Kim and K.-J. Ahn 2011. Paratypes, KOREA: Gangwon Prov., Pyeongchanggun, Jinbu-myeon, Mt Odaesan , Sangwonsa , 22 August to 20 October 2000, KJ Ahn, FIT (1♀) . Paratype, Archaeoboreaphilus macrothorax Kim and Ahn, Desig. T. -K. Kim and K.-J. Ahn 2011; Sangwonsa, 22 June to 16 August 2001, S.-J. Park, C.-W. Shin, FIT (1♀), Paratype, Archaeoboreaphilus macrothorax Kim and Ahn, Desig. T. - K. Kim and K.-J. Ahn 2011; Sangwonsa, 37 ◦ 47.074 ′ N, 128 ◦ 33.735 ′ E, 15 May 2006, T.- K. Kim, H.-W. Kim, sifting leaf litter (1♀) , Paratype, Archaeoboreaphilus macrothorax Kim and Ahn, Desig. T. -K. Kim and K.-J. Ahn 2011.

Distribution

Korea.

Remarks

Archaeoboreaphilus macrothorax sp. nov. can be distinguished from other species by the dark brownish appendages except for A. yasutoshii . Archaeoboreaphilus macrothorax sp. nov. differs from A. yasutoshii in the following characters: pronotum broad and post-lateral margin distinctly emarginate; male sternite VII with macro setae on depressed posterior area; aedeagus less slender and median lobe weakly sinuate in dorsal aspect.

Etymology

The specific name, macrothorax , refers to the large size of pronotum.

Figures

Figure 1. Habitus. (A) Archaeoboreaphilus rubromaculatus sp. nov., length 3.6 mm; (B) Archaeoboreaphilus macrothorax sp. nov, length 3.8 mm.

Figure 2. (A–C) Archaeoboreaphilus rubromaculatus sp. nov.; (D–F) Archaeoboreaphilus macrothorax sp. nov. (A, D) antenna; (B, E) pronotum, dorsal aspect; (C, F) elytron, dorsal aspect. Scale bars 0.3 mm.

Figure 3. (A–C) Archaeoboreaphilus rubromaculatus sp. nov.; (D–G) Archaeoboreaphilus macrothorax sp. nov. (A, E) male tergite VIII, dorsal aspect; (B, F) male sternite VIII, ventral aspect; (C, G) male sternite IX, ventral aspect. (D) male sternite VII, ventral aspect. Scale bars 0.3 mm.

Figure 4. Aedeagus. (A, B) Archaeoboreaphilus rubromaculatus sp. nov.; (C, D) Archaeoboreaphilus macrothorax sp. nov. (A, C) lateral aspect; (B, D) dorsal aspect. Scale bars 0.3 mm.