New hoverfly records for Greece with the description of a new species of Cheilosia (Diptera, Syrphidae)

During several field expeditions to Greece in the years 2021-2024, a total of 295 species of hoverflies were recorded, of which 31 species are new for the country. Our findings raise the total number of the Greek hoverfly fauna to 457 species. We provide a full annotated account of our records for all the species that are new to Greece and for all the species that are Endangered or Critically Endangered according to the recent European Red List of Syrphidae. One new species, Cheilosia pangeoensis Van de Meutter & Bot sp. nov., is here described in full. The DNA barcode of this species was sequenced and compared to similar species. This species was discovered on Mount Pangeon in northern Greece, an isolated mountain next to the Mediterranean coast, and was later also found to be present in Bulgaria.