Key to the Genera of Nearctic Syrphidae
CJAI 23 August 23, 2013

G.F.G. Miranda1,2*, A.D. Young1, M.M. Locke3,4, S.A. Marshall1, J.H. Skevington3,4, F.C. Thompson5

1 Insect Systematics Laboratory, School of Environmental Sciences, University of Guelph, Guelph, ON, Canada.;
2 Instituto Nacional de Pesquisas da Amazônia, Manaus, AM, Brazil / Museu da Amazônia, Manaus, AM, Brazil.
3 Canadian National Collection of Insects, Arachnids and Nematodes, Agriculture and Agri-Food Canada, Ottawa, ON, Canada.;
4Department of Biology, Carleton University, Ottawa, ON, Canada.
5 Department of Entomology, National Museum of Natural History, Smithsonian Institution, Washington, DC, U.S.A.
*Corresponding Author.

| Abstract | Introduction | Materials & Methods | Results & Discussion | Checklist | Genus Key | Acknowledgments | References | PDF (30MB) | Cite this Article |

Results and Discussion

As stated above, we follow the syrphid classification and distribution in Systema Dipterorum (Thompson 2010) with a few exceptions. Monoceromyia, Sphiximorpha and Polybiomyia are considered subgenera of Ceriana in the Systema Dipterorum database but they are treated as full genera in the Manual of Central American Diptera (Thompson et al. 2010), which we follow here. We also follow the Manual of Central American Diptera with respect to our treatment of Copestylum and thus do not divide it into subgenera. Evidence for the monophyly of Copestylum subgenera has not been rigorously tested. Ocyptamus is divided into species groups following Miranda (2011) because we anticipate that these groups will be formally recognized (as genera) in the near future. Eosalpingogaster and Salpingogaster are treated as separate genera following Mengual et al. (2008), Mengual and Thompson (2011) and Miranda (2011). Also following Mengual et al. (2008), Epistrophella, Fazia, Lapposyrphus and Meligramma are given full generic status (split from Epistrophe, Allograpta, Eupeodes and Melangyna respectively). The taxa Arctophila and Sericomyia (Conosyrphus) have been synonimized under Sericomyia sensu stricto as proposed by Skevington and Thompson (2012). Chamaesyrphus is proposed as a subgenus of Pelecocera Meigen, 1822 due to the author’s unpublished data that points out to a close affinity between the two taxa.

Chrysotoxum is currently under revision (Sommaggio and Skevington in prep). Many species currently considered synonyms will be resurrected in this study and are listed under this genus here. Platycheirus (Young 2012) and Volucella (Cheng 2011) are treated in a similar fashion. Leucozona americana is resurrected from synonymy from L. lucorum based on our unpublished morphological data. Leucozona lucorum (Linnaeus, 1758) is thus restricted to the Old World. Similarly, the New World Temnostoma excentrica (Harris, 1841) is resurrected from synonymy with the now Old World-restricted T. vespiforme (Linnaeus, 1758). This decision is based on work done in Asia (Krivosheina 2004) and on mtDNA we have analyzed (the two taxa are not sister species and are 4.8% different based on COI sequences). We have also examined variation within Ferdinandea species and are confident that Ferdinandea dives (Osten Sacken, 1877) and F. nigripes (Osten Sacken, 1877) are both synonyms of F. buccata (Loew, 1863) (new synonyms). There is considerable colour variation within each of these putative Ferdinandea taxa and mitochondrial COI data supports our hypothesis that these represent a single somewhat variable species (unpublished data).