Study sites in the area of Stenobothrus eurasius. (Details see in Suppl. Table 1.) — Abbreviations of the settlement names: BE – Bélapátfalva; BO – Bódvarákó; BU – Budaörs; CE – Cerni; FU – Füzér; GR – Greci; HA – Hainburg; IZ – Izovoarele; MI – Miroslav; MKV – Malé Kršteňan; MN – Mnichov; RA – Raná; SZ – Szárliget; TE – Tés; TO – Tokaj. Abbreviations of the regions: CZB – Czech Basin; MOR – Moravia; VIB – Vienna Basin; SPF – Southern periphery of the Fatra; WHM – Western part of the Hungarian Middle Mts; EHM – Eastern part of the Hungarian Middle Mts; DOB – Dobrogea)