Popov, G., Mishustin, R., Vujic, A., Shparyk, V., Radenkovic, S., Perez-Banon, C., Aracil, A., Korneyev, V., Likov, L., Zamoroka, A., & Rojo, S. (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), 151–192. https://doi.org/10.11646/zootaxa.5768.2.1