Taxonomy and distribution of six Palaearctic Cheilosis species (Diptera, Syrphidae)

New information on the taxonomy of Cheilosia subarctica Hellen, C. albohirta Hellen, and C. brunnipennis Becker together with drawings of male genitalia is given. C. rotundicornis Hellen is synonymised with C. vernalis Fallen. The female of C. reniformis Hellen and the male of C. parafasciata Barkalov are described

Taxonomic review of the Palaearctic species of the Cheilosia caerulescens-group (Diptera, Syrphidae)

The Palaearctic species of the Cheilosia caerulescens group (Diptera: Syrphidae) are revised in this work. The species group belongs to the genus Cheilosia subgenus Taeniocheilosia Oldenberg. One new species is described from north Caucasus, Cheilosia (Taeniocheilosia) circassica sp. n. Cheilosia primulae Hering is established as a junior synonym of Cheilosia laeviventris Loew. Four lectotype designations are made. The species of the Cheilosia caerulescens group are redescribed and illustrated, and a table of diagnostic characters and an identification key to species are provided. MtDNA COI barcodes were generated for several specimens of C. (T.) caerulescens Meigen and other Cheilosia (Taeniocheilosia) and Cheilosia s. str. taxa. Parsimony and maximum likelihood analyses did not place the morphologically similar C. hercyniae Loew in the C. caerulescens group but among other Cheilosia (Taeniocheilosia) taxa. The following eight taxa are included in the Cheilosia (T.) caerulescens group of species: Cheilosia armeniaca Stackelberg, 1960, C. caerulescens caerulescens (Meigen, 1822), C. caerulescens calculosa Skufjin, 1977, C. circassica sp. n., C. herculana Bradescu, 1982, C. kerteszi Szilady, 1938, C. laeviventris Loew, 1857, and C. venosa Loew, 1857.Peer reviewe

Revision of the Merodon serrulatus group (Diptera, Syrphidae)

The phytophagous hoverfly genus Merodon 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 serrulatus species group of Merodon 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 M. serrulatus group, along with the available distributional data. Moreover, descriptions are provided for seven new species, namely M. defectus Vujic, Likov & Radenkovic sp. nov., M. disjunctus Vujic, Likov & Radenkovic sp. nov., M. medium Vujic, Likov & Radenkovic sp. nov., M. nigrocapillatus Vujic, Likov & Radenkovk sp. nov., M. nigropunctum Vujic, Likov & Radenkovic sp. nov., M. opacus Vujic, Likov & Radenkovk sp. nov., and M. trianguloculus Vujic, Likov & Radenkovk sp. nov. In addition, the taxa M. serrulatus (Wiedemann in Meigen, 1822), M. bequaerti Hurkmans, 1993, M. birsutus Sack, 1913, M. kawamurae Matsumura, 1916, M. sacki (Paramonov, 1936) and M. sophron 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 M. serrulatus is revised and a new synonymy is proposed: M. tener Sack, 1913 syn. nov. (junior synonym of M. serrulatus). The identity of M. trizonus (Szilady, 1940) could not be assessed as the type specimens are lost. Thus, the name M. trizonus is considered as nomen dubium. 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.Peer reviewe

A new Platycheirus Le Peletier et Serville, 1828 (Diptera, Syrphidae) species of the manicatus subgroup, from the Taimyr Peninsula (Northern Siberia)

Barkalov, Anatolij V. (2013): A new Platycheirus Le Peletier et Serville, 1828 (Diptera, Syrphidae) species of the manicatus subgroup, from the Taimyr Peninsula (Northern Siberia). Zootaxa 3681 (2): 175-181, DOI: 10.11646/zootaxa.3681.2.

New data on the genus Cheilosia Meigen (Diptera, Syrphidae) from Central Asia with descriptions of two new species and a key to the 'group C'

Barkalov, Anatolij V. (2020): New data on the genus Cheilosia Meigen (Diptera, Syrphidae) from Central Asia with descriptions of two new species and a key to the 'group C'. Zootaxa 4860 (2): 243-256, DOI: https://doi.org/10.11646/zootaxa.4860.2.

On the status of species of the genus Cheilosia Mg. (Diptera: Syrphidae) described by Hervé-Bazin

Type material of Cheilosia antennalis Hervé-Bazin, 1929, C. difficilis Hervé- Bazin, 1930, C. kulinensis Hervé-Bazin, 1930, C. lucens Hervé-Bazin, 1930, C. parachloris Hervé-Bazin, 1929 and C. victoria Hervé-Bazin, 1930 (Diptera, Syrphidae) was studied. Three synonyms were discovered: Cheilosia mupinensis Barkalov, 1999 = C. kulinensis Hervé-Bazin, 1930 syn. nov.; Cheilosia lucens Hervé-Bazin, 1930 and C. ussuriana Barkalov, 1980 = C. antennalis Hervé-Bazin, 1929 syn. nov. Lectotypes were designated for Cheilosia difficilis Hervé-Bazin, 1930, C. kulinensis Hervé-Bazin, 1930, C. parachloris Hervé- Bazin, 1929 and C. victoria Hervé-Bazin, 1930. The species were re-described, with figures of male terminalia

Fig. 43 in Cheilosia (Diptera, Syrphidae: Rhingiini) of Nepal with descriptions of 29 new species

Fig. 43. Cheilosia (Taeniochilosia) nepalensis sp. nov.; A, C, E–H = holotype, ♂ (CNC), B, D = paratype, ♀ (CNC). A. Head, lateral view. B. Head, dorsal view. C–D. Antenna, lateral view of pedicel and basoflagellomere. E. Tip of wing. F. Superior lobes of hypandrium, lateral view. G. Aedeagus and aedeagal apodeme, lateral view. H. Surstylus and gonocercus, lateral view. Scale bars indicated in drawings.Published as part of Barkalov, Anatolij V. & Ståhls, Gunilla, 2022, Cheilosia (Diptera, Syrphidae: Rhingiini) of Nepal with descriptions of 29 new species, pp. 1-127 in European Journal of Taxonomy 829 (1) on page 79, DOI: 10.5852/ejt.2022.829.1863, http://zenodo.org/record/683993

Fig. 10. A–B in Cheilosia (Diptera, Syrphidae: Rhingiini) of Nepal with descriptions of 29 new species

Fig. 10. A–B. Cheilosia (Montanocheila) brevimontana sp. nov., holotype, ♀ (ZSMC); dorsal and lateral views. – C–D. Cheilosia (Floccocheila) collis sp. nov., holotype, ♀ (CSCA); dorsal and lateral views. Photo: Pekka Malinen, FMNH Luomus. Scale bars = 1 mm.Published as part of Barkalov, Anatolij V. & Ståhls, Gunilla, 2022, Cheilosia (Diptera, Syrphidae: Rhingiini) of Nepal with descriptions of 29 new species, pp. 1-127 in European Journal of Taxonomy 829 (1) on page 26, DOI: 10.5852/ejt.2022.829.1863, http://zenodo.org/record/683993

Fig. 8 in Cheilosia (Diptera, Syrphidae: Rhingiini) of Nepal with descriptions of 29 new species

Fig. 8. Cheilosia (Cheilosia) angusta sp. nov. A–B. Holotype, ♂ (IBSJW/NME); dorsal and lateral views. C. Oblique view of scutellum of ♂, paratype (IBSJW/NME).Published as part of Barkalov, Anatolij V. & Ståhls, Gunilla, 2022, Cheilosia (Diptera, Syrphidae: Rhingiini) of Nepal with descriptions of 29 new species, pp. 1-127 in European Journal of Taxonomy 829 (1) on page 23, DOI: 10.5852/ejt.2022.829.1863, http://zenodo.org/record/683993

Fig. 9 in Cheilosia (Diptera, Syrphidae: Rhingiini) of Nepal with descriptions of 29 new species

Fig. 9. Cheilosia (Montanocheila) brevimontana sp. nov., holotype, ♀ (ZSMC). A. Head, lateral view. B. Tip of wing. C. Antenna, lateral view of pedicel and basoflagellomere. D. Head, dorsal view. Scale bars indicated in drawings.Published as part of Barkalov, Anatolij V. & Ståhls, Gunilla, 2022, Cheilosia (Diptera, Syrphidae: Rhingiini) of Nepal with descriptions of 29 new species, pp. 1-127 in European Journal of Taxonomy 829 (1) on page 25, DOI: 10.5852/ejt.2022.829.1863, http://zenodo.org/record/683993