Atheta graminicola

This was netted in flight and initially only identified as Atheta sp. (and that only tentatively). Following the publication of Duff I examined its spermatheca (unfortunately broken into two pieces) and matched this to graminicola. In view of the damage to the spermatheca I checked the main key to ensure external characters matched too, and everything seemed to tie up nicely.

female Atheta graminicola showing head, antenna, pronotum, elytra and spermatheca (both pieces together and then close-ups of each piece), North Elmham Cathedral Meadows (Norfolk, UK), 23rd March 2022