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AbstractThe taxonomy of Merodon 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 and M. puniceusVujić, Radenković, and Pérez-Bañón, 2011 are supported as distinct species belonging to the M. dobrogensisspecies complex within the M. dobrogensisspecies subgroup. Additionally, evidence is presented for the description of a new species, M. rojoiRadenković and Vujić new species, with a distribution in mainland Greece, the Greek island Euboea, and the Peloponnese. A short diagnosis is provided for the M. aureusspecies group, the M. dobrogensisspecies subgroup, and the newly defined M. dobrogensisspecies complex, in addition to a description of the new species, with drawings and photographs of adult morphology.