[Syrphidae] Male genitalia rotation

[ximo mengual sanchis]

Dear all,

this publication came out a couple of years ago, and since then, I wonder
if Sphaerophoria or Ornidia (whose species copulate in an end-to-end
position) are examples of "reverse evolution".

https://phys.org/news/2019-02-evolutionary-rotation-genitalia-tied-success.html

Any ideas? Maybe the authors were not aware of the diversity of positions
in higher Brachycera...

Ximo
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