Astenus (Eurysunius) orgeli, Anlaş, Sinan, 2015

Anlaş, Sinan, 2015, Four new species of Astenus (Eurysunius) Dejean, 1833 from Western Anatolia, Tur k ey (Coleoptera: Staphylinidae, Paederinae), Zootaxa 3986 (4), pp. 472-482 : 475-476

Astenus (Eurysunius) orgeli sp. n.

( Figs. 9–16 , 34 ; Map 1)

Type material. Holotype: TURKEY: ♂, “TR—Aydın province, Aydın Dağları, İmambaba Tepesi, 1430 m, 37°56'41"N, 27°53'46"E, 24.III.2014, leg. Örgel / Holotypus ♂ Astenus orgeli sp. n. det. S. Anlaş 2014 ” ( AZMM). Paratypes: TURKEY: 3♀, same data as holotype; 1♂, Aydın province, 20 km NE Kuyucak, Bayrak Tepe, 1500 m, 38°00'24''N, 28°35'03''E, 25.III.2014, leg. Anlaş; 2♂, 2♀, İzmir province, Bozdağlar, entrance of Ski Resort, 1545 m, 38°19'56"N, 28°06'36"E, 02.V.2014, leg. Yağmur & Örgel (all AZMM).

Etymology. The species is dedicated to Semih Örgel, Manisa, who collected some specimens of this new species.

Description. Measurements (in mm) and ratios (range, n=9): AL 0.96–1.04; HL 0.59–0.63; HW 0.72–0.78; PW 0.68–0.73; PL 0.56–0.60; EL 0.40–0.45; EW 0.72–0.76; AW 0.75–0.82; TiL 0.51–0.54; TaL 0.31–0.33; ML 0.64–0.66 (n=4); TL 4.2–4.7; HL/HW 0.81–0.82; PW/HW 0.93–0.94; PW/PL 1.21–1.22; EL/PL 0.75–0.82; EW/ PW 1.04–1.06; AW/EW 1.04–1.08; TiL/TaL 1.64–1.65.

Habitus as in Fig. 9 . Coloration: usually forebody blackish, with posterior 1/3 of elytra reddish, sometimes head and pronotum dark brown; abdomen blackish with narrow posterior margins of tergites and apex somewhat paler; antennae rufous, legs reddish brown, with femora slightly darker.

Head transverse (see Figs. 9–10 ); dorsal surface convex; with very dense, coarse, large, but shallow punctures; interstices reduced to narrow ridges; pubescence short and greyish. Eyes relatively small, in dorsal view distinctly shorter than post-ocular region. Antennae moderately slender, antennomere III approximately 2 times as long as wide; antennomeres V–X oblong ( Fig. 13 ).

Pronotum weakly transverse (see Figs. 9–10 ); widest at anterior angles, slightly narrowed posteriorly; anterior and posterior angles each with a long seta of slightly more than half length of lateral margin of pronotum; posterior margin convex; dorsal surface with slightly pronounced impressions; microsculpture almost absent; punctation similar to that of head, but slightly sparser, non-areolate, and rather finely granulose, dorsal surface of pronotum more shining than those of head; pubescence of similar length as that of head, but less fine and more conspicuous.

Elytra (see Figs. 9–10 ) with microsculpture absent; punctation dense and distinctly granulose, less welldefined than that of head and pronotum; interstices narrower than diameter of punctures; pubescence yellowish; posterior margin with several long black setae, longest near posterior elytral angles, but always much shorter than lateral setae of pronotum. Hind wings totally reduced.

Abdomen slightly wider than elytra (see Fig. 9 ), widest at segment V, segments III–VI moderately transverse, tergites III–V approximately twice as wide as long; punctation very dense and very fine; interstices on average twice as wide as punctures and without microsculpture; pubescence yellowish brown; posterior margin of tergite VII with palisade fringe.

Male: sternite VII in posterior median area slightly depressed and with some modified dark stout setae, posterior margin weakly concave ( Fig. 12 ); sternite VIII deeply and acutely incised at posterior margin, pubescence unmodified ( Fig. 11 ); aedeagus as in Figs. 14–16 and 34 .

Comparative notes. From all its Anatolian consubgeners, this new species is distinguished by the male sexual characters, especially by the morphology of the aedeagus and by a different coloration (see description, color patterns of the other species given in comparative notes to A. gusarovi ). In addition, A. orgeli is readily distinguished from A. gusarovi especially by the much more slender abdomen, much larger aedeagus, the more deeply and narrowly incised posterior margin of male sternite VIII, and by the ventral process of the aedeagus, which is more slender and apically more acute in lateral view.

Comments. Astenus occiduus was described from Denizli, Aydın and İzmir provinces of Turkey ( Assing 2007). The type series of A. occiduus includes three female paratypes from Aydın (İmambaba Tepesi and Bayrak Tepesi) and İzmir (Bozdağlar). However, an examination of the aedeagus of the specimens collected from the above three localities revealed that it is different from the aedeagus illustrated for A. occiduus by Assing (2007). Therefore, the specimens from Aydın and İzmir provinces previously ( Assing 2007) referred to as A. occiduus belong to A. orgeli , and the distribution of A. occiduus is confined to Denizli province.

Distribution and bionomics. The new species was collected in three localities in the Aydın Mountains (İmambaba Tepesi and Bayrak Tepesi) and Bozdağlar, in the provinces of Aydın and İzmir, in grassland at altitudes of 1430–1545 m. They were found in the nests of Tetramorium sp.

Figures

FIGURES 9 – 16. Details of A stenus (Eurysunius) orgeli sp. n. 9 — habitus; 10 — forebody; 11 — male sternite VIII; 12 — male sternite VII; 13 — antenna; 14 and 15 — aedeagus, lateral view; 16 — aedeagus, ventral view. Scale bar: 1.0 mm (9); 0.5 mm (10); 0.2 mm (11 – 16).

FIGURES 33 – 38. Aedeagi, lateral views. 33 — Astenus (Eurysunius) gusarovi sp. n.; 34 — A. (E.) orgeli sp. n.; 35 — A. (E.) kumlutasi sp. n.; 36 — A. (E.) honazicus sp. n.; 37 — A. (E.) occiduus Assing; 38 — A. (E.) sultanicus Assing. Scale bar: 50 µm (33 – 38).