Resolving the taxonomy of theMerodon dobrogensisspecies subgroup (Diptera: Syrphidae), with the description of a new species

The taxonomy ofMerodon dobrogensisBradescu, 1982 (Diptera: Syrphidae) species subgroup was reviewed. Multiple data sources (morphology, geometric morphometry of wings and surstylus, molecular data, and distributional data) were used to investigate the species subgroup in the manner of integrative taxonomy.Merodon dobrogensisBradescu, 1982 andM. puniceusVujić, Radenković, and Pérez-Bañón, 2011 are supported as distinct species belonging to theM. dobrogensisspecies complex within theM. dobrogensisspecies subgroup. Additionally, evidence is presented for the description of a new species,M. rojoiRadenković and Vujićnew species, with a distribution in mainland Greece, the Greek island Euboea, and the Peloponnese. A short diagnosis is provided for theM. aureusspecies group, theM. dobrogensisspecies subgroup, and the newly definedM. dobrogensisspecies complex, in addition to a description of the new species, with drawings and photographs of adult morphology.