Two Palaearctic species of Orthonevra (Diptera: Syrphidae) under the name O. brevicornis
Żoralski Robert, Van de Meutter Frank, Mengual Ximo, Gadawski Piotr
Acta Entomologica Musei Nationalis Pragae 64(1): 223-242, 2024
Published online: 1st October 2024
Views: 703
Abstract: During studying European material of Orthonevra Macquart, 1829 the presence of
two widespread species so far interpreted as Orthonevra brevicornis (Loew, 1843)
has been discovered. One species occurs from Central Europe into Transcaucasia
and agrees with the taxon O. brevicornis of Loew (1843). The second species, O.
atlantica Żóralski & Van de Meutter sp. nov., has its main distribution
range in the Atlantic parts of Europe and is described here. We provide a
redescription of O. brevicornis and designate a neotype from the type locality
(Poland, Posen [= Poznań] vicinity). The most important characters for
distinguishing males of these two closely related species are in the structures
of the terminalia. A diagnosis and identification key to European black-legged
Orthonevra species is given as well as new sequences of the cytochrome c oxidase
subunit I (COI) of mitochondrial DNA (mtDNA), also known as DNA barcodes, for
most of the species of this group. Some new information and changes to the known
ranges of Orthonevra species are provided as a result of this revisionary work:
O. frontalis (Loew, 1843) is removed from the list of species occurring in
Poland; O. gemmula Violovitsh, 1979 is confirmed from Hungary; O. incisa (Loew,
1843) is confirmed from its locus typicus (Poland, Posen vicinity); and O.
montana Vujić, 1999 is reported from Poland and Austria for the first time and
confirmed for Germany. An explanation for some previous records published as O.
plumbago (Loew, 1840) is also given.
Key words: Diptera, Syrphidae, flower flies, hoverflies, COI, distribution, DNA barcode, identification key, new species, Europe, Palaearctic Region