Longitarsus flavicornis
This came to light and keyed straightforwardly to Longistarsus jacobaeae or flavicornis, with these two requiring gen det to confirm. The median lobe was clearly expanded and bulbous at the apex making it flavicornis. Duff only shows the median lobe in flat view but Hackston also shows it in side view and this shows an equally obvious (perhaps even more so) difference in the shape - much more gradually and finely tapered to a point in jacobaeae. This is supported by photos of the lobes at baza.biomap.pl.
, WBEP, 15-Sep-23 (A) (1).jpg)
, WBEP, 15-Sep-23 (A) (2).jpg)
, WBEP, 15-Sep-23 (A) (3).jpg)
, WBEP, 15-Sep-23 (A) (5).jpg)
, WBEP, 15-Sep-23 (A) (6).jpg)
, WBEP, 15-Sep-23 (A) (7).jpg)
, WBEP, 15-Sep-23 (A) (8).jpg)
male Longitarsus flavicornis showing close-ups of hind tibia, pronotum, elytra base and median lobe (3 views: flat, close-up of apex and side), Wendling Beck Environment Project (Norfolk, UK), 15th September 2023
Except that the femora had darkened somewhat on death (but unevenly and not apically) this keyed to flavicornis/jacobaeae and the genitalia resolved it as flavicornis. It was found by suction.
, Dillington Carr, 30-Jul-25 (A) (2).jpg)
, Dillington Carr, 30-Jul-25 (A) (3).jpg)
, Dillington Carr, 30-Jul-25 (A) (1).jpg)
, Dillington Carr, 30-Jul-25 (A) (4).jpg)
, Dillington Carr, 30-Jul-25 (A) (5).jpg)
, Dillington Carr, 30-Jul-25 (A) (6).jpg)
, Dillington Carr, 30-Jul-25 (A) (7).jpg)
, Dillington Carr, 30-Jul-25 (A) (8).jpg)
, Dillington Carr, 30-Jul-25 (A) (10).jpg)
, Dillington Carr, 30-Jul-25 (A) (9).jpg)
male Longitarsus flavicornis showing hind tibia, frons, elytron, pronotum & elytra base and median lobe (flat and side views with close-up of apex from other side), Wendling Beck Environment Project (Norfolk, UK), 30th July 2025