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It is hardly relevant in Europe, of course, but the Rhiniidae are plentyful in the Old world tropics.
Another problem is that there is nomsuchnthing as 'Calliphoridae', it is paraphyletic. But nobody somfar proposed a new system.
If you are interested, Google for 'Phylogeny Oestroidea' and look for authors Kutty, Wiegmann and Stireman.

Theo