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Stenus clavicornis

This was found by suction sampling. I keyed it using Lott & Anderson and got it to clavicornis before examining the genitalia. Then I checked the aedegaus and fortunately that matched my ID.

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female Stenus aceris showing hind leg, hind tarsus, basal tergite, elytra, tergites 6 & 7, other tergites and aedeagus, Wendling Beck Environment Project (Norfolk, UK), 17th April 2025