Revision of the group (Diptera, Syrphidae).

The phytophagous hoverfly genus Meigen, 1803 (Diptera, Syrphidae), which comprises more than 160 species distributed in Palaearctic and Afrotropical regions, can be differentiated into multiple groups of species that harbor high levels of hidden diversity. In this work, the species group of is revised, providing an illustrated key to species, a detailed discussion on the taxonomic characters and a morphological diagnosis, including also the first data about the preimaginal morphology of this species group. The study includes characteristics of the 13 species of the group, along with the available distributional data. Moreover, descriptions are provided for seven new species, namely Vujić, Likov & Radenković , Vujić, Likov & Radenković , Vujić, Likov & Radenković , Vujić, Likov & Radenković , Vujić, Likov & Radenković , Vujić, Likov & Radenković , and Vujić, Likov & Radenković In addition, the taxa (Wiedemann in Meigen, 1822), Hurkmans, 1993, Sack, 1913, Matsumura, 1916, (Paramonov, 1936) and Hurkmans, 1993 are redefined and redescribed. Following a detailed study of the type material sourced from different entomological collections, the status of all available taxa related to is revised and a new synonymy is proposed: Sack, 1913 (junior synonym of ). The identity of (Szilády, 1940) could not be assessed as the type specimens are lost. Thus, the name is considered as . The monophyly and composition of this species group are assessed through Maximum Parsimony and Maximum Likelihood analyses of the mitochondrial COI and nuclear 28S rRNA gene sequences.