Popov, Grigory, Ruslan Mishustin, Ante Vujic, Viktor Shparyk, Snezana Radenkovic, Celeste Perez-Banon, Andrea Aracil, Valery Korneyev, Laura Likov, Andrew Zamoroka, and Santos Rojo. 2026. “True Elves: a Review of the Members of the Merodon constans Group (Diptera: Syrphidae) Breeding in Snowdrops and Snowflakes (Galantheae), With Description of Two New Caucasian Species”. Zootaxa 5768 (2). Auckland, New Zealand:151-92. https://doi.org/10.11646/zootaxa.5768.2.1.