Pseudocistela ceramboides
Apparently not a very common species.
This came to light in my garden. It reminded me of Isomira murina but with strongly serrate antennae. It was also quite a large insect (about 10mm), the apical maxillary palpomere was big and the eyes were more incised.
Pseudocistela ceramboides, North Elmham (Norfolk, UK), 31st May 2025
This one also came to light. According to Duff's key, not only should this species (and several others) have strongly notched eyes and relatively large apical segments of the maxillary palps (which they clearly do) but also the hind coxal margins should be at the same level as the first visible abdominal sternite. As there is a clear step between the abdominal sternites and the mesosternum, with the rear margin of the coxae bridging the gap, I'm not sure I understand this.
Pseudocistela ceramboides showing maxillary palps and eyes, step between sternites and mesosternum, and side of abdomen, Wendling Beck Project (Norfolk, UK), 23rd June 2026