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Hi,
Limnophora females are tricky, nevertheless I’d like to show you this one. In the key of D’Assis Fonseca (1968), the description of L. riparia fits quite well, as the flat frons looks strikingly white at certain angles. However, the pictures were taken in Berlin (on the banks of a little stream, 20 June 2024), and L. riparia has not yet been recorded for the Berlin/Brandenburg region... So has this fly, so patiently posing in front of the camera, to remain Limnophora spec.?
Thanks for help, Sundew