Key to the Didea, Dideomima, Asiodidea and Megasyrphus of the World
These are the Syrphine genera with a dipped radial vein.
This has been a bit of a challenge, but quite a lot of fun. Use this key with caution of course, some of these species are very poorly known, others very variable. The genus Didea in particular I think needs revision, and who knows if geographic variation is hiding distinct species currently under the same name?
Anyway, I hope at least this disseminates some information about these rather nice species.
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My ID link: https://www.inaturalist.org/observations/identify?taxon_id=465480,70213,1073081,1355426
Are there multiple Dideomima species in Arizona?
I honestly don't know - it would be lovely for the info to be published at some point
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