Pyrophaena is a subgenus of the hoverfly genus Platycheirus[1] distinctive enough to sometimes treated as a separate genus in its own right.
[2] Indeed a recent study of the phylogeny of the subfamily Syrphinae[3] found it to be closer to other certain other genera – Rohdendorfia, Syrphocheilosia and Spazigaster.
Since only a few species were sampled the true systematic structure must await a more thorough survey of Platycheirus and related genera.
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