Male genitalia, surstylus, lateral view. A Merodon serrulatus, Spain B Merodon serrulatus, France C Merodon serrulatus, Greece (Pindos) D Merodon serrulatus, Greece (Olympos) E Merodon serrulatus, Greece (Peloponnese) F Merodon serrulatus, Montenegro G Merodon serrulatus, Russia H Merodon medium sp. nov. G, H margin of anterior surstyle lobe marked with arrow. Abbreviation: bp–basolateral protrusion. Scale bar: 0.2 mm.

 
 
  Part of: Vujić A, Likov L, Radenković S, Kočiš Tubić N, Djan M, Šebić A, Pérez-Bañón C, Barkalov A, Hayat R, Rojo S, Andrić A, Ståhls G (2020) Revision of the Merodon serrulatus group (Diptera, Syrphidae). ZooKeys 909: 78-158. https://doi.org/10.3897/zookeys.909.46838