Oedothorax retusus
This was in a pitfall trap in a grassy area beside a wet woodland. The head profile got me to retusus and the pedipalp confirmed it.
male Oedothorax retusus showing head from side and pedipalp from 4 angles, Wendling Beck Environment Project (Norfolk, UK), 11th-12th May 2025
This was also in a pitfall trap but in a dryer environment, in the middle of an ex-arable field that's starting to be restored to heathland. It was caught together with two Oedothorax apicatus.
male Oedothorax retusus showing head from side (both sides) and pedipalp from 3 angles, Wendling Beck Environment Project (Norfolk, UK), 25th-26th August 2025