Mengual X, Thompson FC. A taxonomic review of the Palpada ruficeps species group, with the description of a new flower fly from Colombia (Diptera: Syrphidae). Zootaxa [Internet]. 2008 Apr. 4 [cited 2025 Apr. 20];1741(1):31–36. Available from: https://mapress.com/zt/article/view/zootaxa.1741.1.3