Eurysunius

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 : 74-76

Key to the Turkish species of the subgenus Eurysunius

The keys to Turkish Eurysunius species in Assing (2002, 2007, 2010, 2011, 2013, 2015) and Anlaş (2014, 2015, 2016, 2017, 2018, 2019, 2021, 2022) are updated as follows:

1. Lateral margins of pronotum with one seta at anterior angle; elytra with yellow coloration confined to posterior third. Northern Anatolia: Ordu .................................................................. A. bicoloratus Assing, 2002

– Lateral margins of pronotum with more than one seta........................................................2.

2. Lateral margins of pronotum with two setae at anterior and posterior angles.......................................3.

– Lateral margins of pronotum with three setae; one at anterior angle, one at anterior third, and one at posterior angle......23.

3. Pronotum approximately as wide as long................................................................ .. 4.

– Pronotum transverse..................................................................................6.

4. Elytra uniformly yellowish or with yellow coloration confined to posterior half; legs and antennae yellowish red. Northern Anatolia: Bolu, Kastamonu ..................................................... A. paphlagonicus Assing, 2002

– Posterior 1/5–1/8 of the elytra yellowish; legs and antennae reddish or reddish brown...............................5.

5. Posterior 1/6–1/5 of the elytra yellowish; antennomeres IV–X approximately as long as broad to weakly transverse. Greece: Rhodes; Southwestern Anatolia: Muğla ................................................ A. rhodicus Assing, 2013

– Posterior 1/8 of the elytra yellowish antennomeres; IV–X nearly 1.5 times as long as broad. Central-northwestern Anatolia: Bursa (Uludağ)................................................................... A. brachati Assing, 2011

6. Pronotum wider than head............................................................................. 7.

– Pronotum narrower than head.......................................................................... 8.

7. Pronotum distinctly (approximately 1.20 times) wider than head. Central-western Anatolia: Afyonkarahisar, Konya ....................................................................................... A. sultanicus Assing, 2010

– Pronotum slightly (approximately 1.05 times) wider than head. Western Anatolia: Denizli (Gölgeli Mountains)........................................................................................... A. occiduus Assing, 2007

8. Head and pronotum blackish or dark brown............................................................... 9.

– Head and/or pronotum not blackish or dark brown..........................................................18.

9. Forebody completely blackish. Central-western Anatolia: Uşak and Kütahya .................. A. kumlutasi Anlaş, 2015

– Forebody not completely blackish.......................................................................10.

10. Pronotum blackish or dark brown...................................................................... 11.

– Head blackish or dark brown; pronotum reddish; elytra reddish-yellow with slightly infuscate portion near scutellum. Central Anatolia: Niğde (Melendiz Mountain).............................................. A. melendizicus Anlaş, 2018

11. Elytra completely reddish brown or yellowish brown, with area near scutellum more or less infuscate............... .. 12.

– Elytra not completely reddish brown or yellowish brown................................................... 13.

12. Apical portion of ventral process of the aedeagus with slender-shaped in lateral view. Central Anatolia: Kırşehir ............................................................................................. A. neseti Anlaş, 2021

– Apical portion of ventral process of the aedeagus with stout-shaped in lateral view. Central Anatolia: Eskişehir (Türkmen Mountain)................................................................... A. turkmendagicus Anlaş, 2022

13. Pronotum blackish, posterior 1/3 of elytra reddish. Western Anatolia: Aydın, Izmir (Bozdağlar)....... A. orgeli Anlaş, 2015

– Pronotum blackish or dark brown, posterior half of elytra reddish-yellow or yellowish............................. 14.

14. Dorsal surface of pronotum with pronounced impressions.................................................... 15.

– Dorsal surface of pronotum without pronounced impressions.................................................16.

15. Elytra 1.60 times as wide as long; abdomen wider than elytra. Central Anatolia: Afyonkarahisar (Ahır Mountains)............................................................................................ A. ilgazi Anlaş, 2016

– Elytra 1.70–1.75 times as wide as long; abdomen narrower than elytra. Central Anatolia: Eskişehir (Sündiken Mountain)................................................................................. A. sundikenicus Anlaş, 2022

16. Apical portion of ventral process of the aedeagus distinctly triangular-shaped in lateral view. Central northern Anatolia: Çorum (Kargı).............................................................................. A. corumensis sp. n.

– Apical portion of ventral process of the aedeagus without or indistinctly triangular-shaped in lateral view...............17.

17. Elytra 1.80–1.85 times as wide as long; posterior incision of sternite VIII in the middle very narrow and acute; apical portion of ventral process with slender-shaped in lateral view of the aedeagus. Central Northern Anatolia: Sivas ................................................................................................... A. kirani Anlaş, 2021

– Elytra 1.70–1.75 times as wide as long; posterior incision of sternite VIII in the middle narrow; apical portion of ventral process with thickened-shaped in lateral view of the aedeagus. Central Northern Anatolia: Sivas .......... A. sivasicus Anlaş, 2019

18. Head dark brown, pronotum reddish brown. Central Anatolia, Konya (Meke)................... A. mekeensis Anlaş, 2022

– Head and pronotum reddish or reddish brown............................................................ 19.

19. Dorsal surface of pronotum without pronounced impressions; head, pronotum and elytra completely reddish brown. Central-western Anatolia: Afyonkarahisar (Sandıklı Mountains).................................. A. sandiklicus Anlaş, 2014

– Dorsal surface of pronotum with pronounced impressions; head, pronotum and elytra not completely reddish brown.....20.

20. Head darker than pronotum and elytra; head reddish brown, pronotum and elytra reddish, with the posterior area slightly lighter. Southwestern Anatolia: Antalya ......................................................... A. goeki Anlaş, 2017

– Head not darker than pronotum and elytra................................................................21.

21. Abdomen wider than elytra; elytra strongly transverse, with 1.70–1.80 times as long..............................22.

– Abdomen narrower than elytra; elytra weakly transverse, with 1.10–1.15 times as long completely, body yellowish brown, with the middle of each elytron slightly infuscate spots. Central Northern Anatolia: Sivas and Southern Anatolia: Karaman ........................................................................................ A. pelinae Anlaş, 2019

22. Head and pronotum reddish brown, elytra yellowish brown, with area near scutellum, anterior margin, and anterior part of lateral margin infuscate, abdomen dark brown. Western Anatolia: Denizli (Çökelez Mountains).... A. gusarovi Anlaş, 2015

– Head, pronotum and abdomen reddish brown, more than anterior half of elytra dark brown, with posterior area reddish yellow. Western Anatolia: Denizli (Honaz Mountain)........................................... A. honazicus Anlaş, 2015

23. Elytra black or dark brown, with posterior area yellowish brown...............................................24.

– Elytra yellowish or yellowish brown, with a more or less infuscate portion near the scutellum...................... 26.

24. Anterior half of elytra brown, with posterior area reddsh. Central northern Anatolia: Çorum (Çağşak environs).................................................................................................. A. hititicus sp. n.

– More than anterior half of elytra black or dark brown, with posterior area yellowish brown........................ .. 25.

25. Pronotum 1.25 times as wide as long and distinctly narrower than head; abdomen approximately as broad as elytra. Central northern Anatolia: Amasya ................................................................ A. kaspareki sp. n.

– Pronotum 1.10–1.15 times as wide as long and approximately as broad as head or slightly narrower than head; abdomen narower than elytra. Central Northern Anatolia: Sivas ....................................... A. veyseli Anlaş, 2021

26. Body 3.9 mm long; head narrower than pronotum; elytra 1.75 times as wide as long. Central Anatolia: Kırıkkale ............................................................................................ A. gultekini Anlaş, 2021

– Body more than 4.3 mm long; head broader than pronotum or approximately as broad as pronotum; elytra 1.5–1.6 times as wide as long........................................................................................... 27.

27. Head broader than pronotum; abdomen slightly narrower than elytra; legs and antennae yellowish brown; eyes distinctly shorter than postocular region. Central Anatolia: Kayseri ....................................... A. sexsetosus Assing, 2002

– Head approximately as broad as pronotum; abdomen slightly wider than elytra; legs and antennae reddish or blackish-brown; eyes nearly as long as postocular region. Central Anatolia: Nevşehir .......................... A. kociani Assing, 2015