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

The taxonomy of Merodon dobrogensis Bradescu, 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 dobrogensis Bradescu, 1982 and M. puniceus Vujic, Radenkovic, and Perez-Banon, 2011 are supported as distinct species belonging to the M. dobrogensis species complex within the M. dobrogensis species subgroup. Additionally, evidence is presented for the description of a new species, M. rojoi Radenkovic and Vujic new species, with a distribution in mainland Greece, the Greek island Euboea, and the Peloponnese. A short diagnosis is provided for the M. aureus species group, the M. dobrogensis species subgroup, and the newly defined M. dobrogensis species complex, in addition to a description of the new species, with drawings and photographs of adult morphology.Peer reviewe

Merodon chalybeus Subgroup: An Additional Piece of the M. aureus Group (Diptera, Syrphidae) Puzzle

In this study, we examined the morphology, genetics and distribution of the members of the Merodon chalybeus subgroup (M. aureus species group): M. chalybeus Wiedemann in Meigen, 1822, M. minutus Strobl, 1893 and M. robustus Veselić, Vujić & Radenković, 2017. Two of the species, M. chalybeus and M. minutus, are morphologically very similar and often misidentified in the literature. Here, by employing an integrative taxonomic approach we provide strong evidence for the separation of M. chalybeus and M. minutus. Our results show their clear allopatric distribution: M. minutus on the Balkan Peninsula, Sicily, Sardinia and Corsica, while M. chalybeus is a western Mediterranean species distributed on the Iberian Peninsula and northwest Africa. Data on the distribution of M. robustus were updated, with new records from Cyprus, Israel and Turkey, besides its type locality (Samos in Greece). We provide evidence for M. chalybeus and M. minutus representing a species complex, named the M. chalybeus complex, which together with M. robustus constitute the M. chalybeus subgroup.Peer reviewe