Revision of the Merodon bombiformis group (Diptera: Syrphidae) - rare and endemic African hoverflies Author Vujić, Ante E80A5C9B-5450-4E15-ACEB-FC3B94CF2244 University of Novi Sad, Faculty of Sciences, Department of Biology and Ecology, Trg Dositeja Obradovića 2, 21000 Novi Sad, Serbia. ante.vujic@dbe.uns.ac.rs Author Radenković, Snežana 26DF35D9-55FA-4485-8E8C-C1F90EFE1036 University of Novi Sad, Faculty of Sciences, Department of Biology and Ecology, Trg Dositeja Obradovića 2, 21000 Novi Sad, Serbia. snezana.radenkovic@dbe.uns.ac.rs Author Zorić, Ljiljana Šašić A0EFB962-F816-4399-A5F2-67839DD19CE8 University of Novi Sad, BioSense Institute, Dr Zorana Ðinđića 1, 21000 Novi Sad, Serbia. ljsasic@biosense.rs Author Likov, Laura 6787F9E8-3EA9-4695-B8A1-725787BCB9DD University of Novi Sad, Faculty of Sciences, Department of Biology and Ecology, Trg Dositeja Obradovića 2, 21000 Novi Sad, Serbia. laura.likov@dbe.uns.ac.rs Author Tot, Tamara E4436AC7-B3B6-4899-838D-5A6ECD8E6BFB University of Novi Sad, Faculty of Sciences, Department of Biology and Ecology, Trg Dositeja Obradovića 2, 21000 Novi Sad, Serbia. tamaratot90@gmail.com Author Veselić, Sanja 625C1317-F45B-46E8-B55E-51032B1F7C67 University of Novi Sad, Faculty of Sciences, Department of Biology and Ecology, Trg Dositeja Obradovića 2, 21000 Novi Sad, Serbia. sanja.veselic@dbe.uns.ac.rs Author Djan, Mihajla BE29D9A9-CC69-416C-8F85-4B8AA99A6C71 University of Novi Sad, Faculty of Sciences, Department of Biology and Ecology, Trg Dositeja Obradovića 2, 21000 Novi Sad, Serbia. mihajla.djan@dbe.uns.ac.rs text European Journal of Taxonomy 2021 2021-06-21 755 1 88 135 http://dx.doi.org/10.5852/ejt.2021.755.1401 journal article 5990 10.5852/ejt.2021.755.1401 fc3a8901-c995-49e0-b8b5-6ec0c9727de4 2118-9773 5013000 F8C5C34F-CCBB-420B-9319-1DA224A5D783 Key to the species of the Merodon bombiformis species group Female of M. vittatus sp. nov. is unknown. 1. Species with reddish-yellow/golden face, frons ( Figs 9A , 15A ), lateral sides of scutum ( Figs 10A , 14A ) and most of terga ( Figs 5A , 14A ); oral margin reduced ( Fig. 9A ); antennal segments very short ( Fig. 4A ) ...................................................................................... Merodon bombiformis Hull, 1944 − Species with mostly dark face, frons, lateral sides of scutum and most of terga; oral margin protruded ( Fig. 9B–F ); antennal segments longer ( Fig. 4B–F ) ......................................................................... 2 2. Large, dark/brownish species (body length 10–14 mm ) with distinct pollinose fasciae on terga 2–4 covered with whitish to yellow pile ( Figs 5B–D , 14B–C ); tergum 4 with broad medial pollinose fasciae; scutum with five longitudinal pollinose vittae; face dark, mostly covered with gray pollinosity ......................................................................................................................................... 3 − Smaller, black species (body length 6–9 mm ) without or with less distinct pollinose fasciae on terga 2–4 ( Fig. 5E–F ); tergum 4 with less distinct medial pollinose fasciae; scutum without or with indistinct pollinose vittae; face shiny black without pollinosity ...................................................... 5 3. Metafemur with shorter and less dense pilosity, especially ventro-laterally ( Figs 6B–C , 16B ); eye contiguity longer, more than 15 ommatidia long; anterior margin of surstyle angular in lateral view ( Figs 7D , 13D ) .................................................................................................................................. 4 − Metafemur with long and dense pilosity, especially ventro-laterally ( Figs 6D , 16C ); eye contiguity shorter, about 10 ommatidia long; anterior margin of surstyle rounded in lateral view ( Fig. 7A : ams) ........................................................................................ Merodon zebra Vujić & Radenković sp. nov. 4. Male genitalia with narrow, S-shaped posterior lobe of surstyle, gradually narrowing toward tip ( Fig. 7D ) (female unknown) .............................................. Merodon vittatus Vujić & Likov sp. nov. − Male genitalia with broad posterior lobe of surstyle, slightly curved, with almost parallel sides and rounded apex ( Fig. 13D ) ........................................................ Merodon multifasciatus Curran, 1939 5. Terga 2–4 without pollinosity, only with medial fasciae of whitish pile ( Figs 5E , 14D ) (in female a pair of indistinct pollinose fasciae on tergum 4) .......... Merodon lotus Vujić & Radenković sp. nov. − Terga 2–4 with pairs of medial pollinose fasciae, covered with whitish to yellowish pile ( Figs 5F , 14E ) ..................................................................................................... Merodon nasicus Bezzi, 1915