Astenus (Eurysunius) kaspareki, Anlaş, 2024

Anlaş, Sinan, 2024, On the subgenus Eurysunius Reitter of Turkey IX. Three new species from central northern Anatolia, with an identification key to Turkish species (Coleoptera: Staphylinidae: Paederinae, Astenus), Zootaxa 5474 (1), pp. 68-76 : 72-74

Astenus (Eurysunius) kaspareki sp. n. ( Figs. 17–24 ; Map 1 )

Type material. Holotype: TURKEY: ♂, ‘‘ Amasya, Gümüşhacıköy, İmirler 5 km W, 40°52'14"N, 35°06'23"E, 1645 m, 20.VI.2020, leg. Örgel & Kacar. / Holotypus ♂, Astenus (Eurysunius) kaspareki sp. n. det. S. Anlaş 2024” <red printed label> ( AZMM) . Paratypes: 5♂♂, 4♀♀, same data as holotype . 3♂♂, 6♀♀, Amasya, Gümüşhacıköy, Sallar 6 km E, 40°53'53"N, 35°05'08"E, 1650 m, 27.IV.2020, leg. Örgel, Kacar & Çelik. 1♂, 1♀, Amasya, Hamamözü, Tekçam 1 km SE, 40°42'50"N, 35°06'12"E, 1562 m, 27.IV.2020, leg. Örgel, Kacar & Çelik. 1♂, 1♀, Amasya, Hamamözü, Tekçam 1 km SE, 40°42'50"N, 35°06'13"E, 1568 m, 10. V.2022, leg. Kacar & Çelik. <all paratypes with red printed label> ( AZMM).

Description. Habitus as in Fig. 17 . Body 4.2–4.6 mm long. Coloration: head, pronotum and abdomen blackish; more than anterior half of elytra black or dark brown, with posterior area yellowish brown; antennae yellowish or reddish yellow and legs with the femora dark-brown, the tibiae yellowish brown, and the tarsi yellowish.

In general appearance similar to A. hititicus , but can be distinguished as follows:

Head 1.15–1.20 times as long as wide ( Figs 17–18 ), punctation slightly sparser than that of A. hititicus , antennae shorter than A. hititicus , 1.02–1.06 mm long. Pronotum shorter than wide, approximately 1.25 times as wide as long and narrower than head; microsculpture absent, punctation slightly denser than that of A. hititicus . ( Figs 17–18 ). Elytra 1.70 times as wide as long ( Figs 17–18 ). Abdomen approximately as broad as elytra ( Fig. 18 ).

♂: sternite VII in posterior median area with some modified dark and short setae, posterior margin slightly concave ( Fig. 19 ); posterior incision of sternite VIII in middle narrow and acute ( Fig. 20 ); aedeagus 0.60–0.62 mm long, as in Figures 21–24 and apex of ventral process with nipple-shaped in ventral view.

Comparative notes. The new species can be distinguished from all other consubgeners except A. sexsetosus , A. kociani , A. veyseli and A. gultekini by the presence of three (rather than two or one) long setae on either of the lateral margins of the pronotum. The new species is separated from these species by the different morphology of the male sexual characters, it is additionally separated as follows:

From A. sexsetosus by the different coloration of the forebody ( A. sexsetosus : Head, pronotum and abdomen blackish brown, elytra yellowish, sometimes with a more or less infuscate portion near the scutellum), by less transverse head ( A. sexsetosus : head 1.3 times as wide as long), by the much more transverse elytra ( A. sexsetosus : elytra 1.5–1.6 times as wide as long).

From A. kociani by the different coloration of the forebody ( A. kociani : head and pronotum blackish; elytra dark yellowish-brown, with the region near the scutellum infuscate), by the shorter antennae ( A. kociani : antennae 1.15 mm), by the much more transverse elytra ( A. kociani : elytra approximately 1.50 times as wide as long).

From A. veyseli by the different coloration of the body ( A. veyseli : head and pronotum black or dark brown, more than anterior half of elytra black or dark brown, with posterior area yellowish brown, abdomen black or dark brown with the posterior margins of segments VI–VIII reddish brown), by the much more transverse pronotum ( A. veyseli : pronotum 1.10–1.15 times as wide as long), by the slightly shorter antennae ( A. veyseli : antennae 1.08–1.12 mm), by the much wider abdomen and by the broader posterior incision in sternite VIII.

From A. gultekini by the larger body ( A. gultekini : 3.9 mm), by the different coloration of the forebody ( A. gultekini : head, pronotum and abdomen blackish; elytra yellowish brown, with area near scutellum and anterior margin infuscate), by the much more transverse pronotum ( A. gultekini : pronotum 1.1 times as wide as long).

Etymology. The new species is dedicated to Dr. Max Kasparek, Germany, a specialist on Megachilidae ( Hymenoptera ), who has carried out important entomological studies in the world.

Distribution and bionomics. The new species was collected from four localities from Amasya province ( Map 1 ), in various grassland areas at altitudes of 1560–1650 m. The type specimens were found in the nests of Tetramorium sp.

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Figures

MAP 1. Distribution of Astenus (Eurysunius) species in Turkey (28 species)

FIGURES 17–24. Astenus (Eurysunius) kaspareki sp. n. 17—habitus; 18—forebody; 19—Male sternite VII; 20—Male sternite VIII; 21, 22—Aedeagus in lateral view; 23, 24—Aedeagus in ventral view. Scale bars: 0.5 mm (Figs. 17–18), 0.2 mm (Fig. 19–24).