Reference
Jeroen van Steenis, Menno P. van Zuijen, Antonio Ricarte, M. Angeles Marcos-García, Dieter Doczkal, Axel Ssymank, Ximo Mengual (2020): First records of Chrysotoxum volaticum Séguy, 1961 from Europe and Platycheirus marokkanus Kassebeer, 1998 from Spain (Diptera: Syrphidae) together with additional records of Spanish Chrysotoxum Meigen, 1803 – Bonn zoological Bulletin - früher Bonner Zoologische Beiträge. – 69: 141 - 155.