Astenus (Eurysunius) neseti, Anlaş, 2021

Anlaş, Sinan, 2021, On the subgenus Eurysunius Reitter of Turkey VII. Four new species from central Anatolia, and additional records (Coleoptera: Staphylinidae: Paederinae Astenus), Zootaxa 4991 (2), pp. 343-352 : 349-350

Astenus (Eurysunius) neseti s Anlaş, sp. n. ( Figs. 25-32 ; Map 1 )

urn:lsid:zoobank.org:act:B48E9F0D-1A64-4C64-B488-B54CCF767B82

Type material. Holotype: TURKEY: ♂, ‘‘TR. Kırşehir, Kaman, Başköy 3 km SW, 39°19’05”N, 33°49’49”E, 1520 m, 10.IV.2019, leg. Örgel & Köksal. / Holotypus ♂, Astenus (Eurysunius) neseti sp. n. det. S. Anlaş 2020” ( AZMM) . Paratypes: 1♂, 2♀♀, same data as holotype ( AZMM) ; 2♀♀, same data as holotype but 27.III.2019 ( AZMM) .

Description. Habitus as in Fig. 25 . Body 3.7-3.9 mm long. Coloration: head blackish or dark brown, pronotum and abdomen blackish; elytra reddish brown, with area near scutellum slightly infuscate; antennae yellowish brown and legs with the femora dark-brown, the tibiae brown, and the tarsi yellowish brown.

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

Head 1.10-1.15 times as long as wide ( Figs 25-26 ), punctation slightly denser and much more distinct than that of A. kirani , antennae 0.92-0.97 mm long. Pronotum shorter than wide, approximately 1.2 times as wide as long ( Figs 25-26 ). Elytra 1.50 times as wide as long ( Figs 25-26 ), punctation slightly denser than that of A. kirani . Abdomen narrower than elytra ( Fig. 25 ), 0.80-0.85 times as wide as elytra; punctation slightly denser than that of A. kirani .

♂: sternite VII in posterior median area with modified dark and short setae, posterior margin slightly concave ( Fig. 27 ); sternite VIII deeply and acutely incised posteriorly, pubescence unmodified ( Fig. 28 ); aedeagus 0.58-60 mm long and as in Figures 29-32 .

Comparative notes. This new species is distinguished from other consubgeners particularly by the distinctive shape of the apex of the ventral process of the aedeagus. Based on the similar morphology of the male primary and secondary sexual characters, the new species is closely related to A. kirani , but mainly distinguished from A. kirani (and also from other species, with two long setae on the lateral margins of the pronotum from central Anatolia: A. sivasicus , A. pelinae Anlaş, 2019 and A. melendizicus Anlaş, 2018 ) by the different coloration of the body and by the different shape of the aedeagus both ventral and lateral view. In addition, the new species differs from other species known from central Anatolia ( A. sexsetosus , A. kociani , A. veyseli , and A. gultekini ) by the presence of two (vs. three) long setae on the lateral margins of the pronotum.

Etymology. The specific epithet is in honor of a famious Turkish minstrel, Neşet Ertaş (1938-2012), who was born in Kırşehir province, Turkey.

Distribution and bionomics. The species was collected only one locality from Kaman districts in Kırşehir province ( Map 1 ), in a grassland area at an altitude of 1520 m. The specimens were found in the nests of Tetramorium diomedeum Emery, 1908 .

Figures

MAP 1. Distribution of Astenus (Eurysunius) species in Turkey: A. bicoloratus Assing, 2002 (large filled circle), A. brachati Assing, 2011 (large filled triangle), A. goeki Anlaş, 2017 (large open triangle), A. gultekini sp. n (large filled inverted triangle), A. gusarovi Anlaş, 2015 (large open square), A. honazicus Anlaş, 2015 (small filled triangles), A. ilgazi Anlaş, 2016 (small filled squares), A. kirani sp. n (open crosses), A. kociani Assing, 2015 (large filled square), A. kumlutasi Anlaş, 2015 (small open inverted triangles), A. melendizicus Anlaş, 2018 (large open circle), A. neseti sp. n (large open inverted triangle), A. occiduus Assing, 2007 (small hexagons), A. orgeli Anlaş, 2015 (small filled circles), A. paphlagonicus Assing, 2002 (small open squares), A. pelinae Anlaş, 2019 (open stars), A. rhodicus Assing, 2013 (filled cross), A. sandiklicus Anlaş, 2014 (small open triangles), A. sexsetosus Assing, 2002 (large filled hexagon), A. sivasicus Anlaş, 2019 (small filled inverted triangles), A. sultanicus Assing, 2010 (filled stars), A. veyseli sp. n (small open circles).

FIGURES 25–32. Astenus (Eurysunius) neseti sp. n. 25—habitus; 26—forebody; 27—Male sternite VII; 28—Male sternite VIII; 29, 30—Aedeagus in lateral view; 31, 32— Aedeagus in ventral view. Scale bars: 0.5 mm (Figs. 25-26), 0.2 mm (Fig. 27-32).