Oedothorax apicatus

This was in a pitfall trap on ex-arable heath restoration (only a few months out of arable production). I narrowed it down to either Oedothorax retusus or apicatus based on the epigyne, with a marginal preference for apicatus. According to Roberts the length of tibia IV spine is usually less than 1.8x the width of the tibia at that point in female apicatus but at least 2x in female retusus. That seemed to confirm it was apicatus, but the differences are quite marginal and it's a genus I had no prior experience of (I later found I'd also caught a male retusus at the same time, though in different habitat). So I presented four of the following photos on BlueSky and sought advice from more experienced folk. I'm grateful to Richard and Tylan for lending their support for my ID.

female Oedothorax apicatus showing eyes, epigyne (before and after clearing with 3 views of the latter) and tibia IV, Wendling Beck Environment Project (Norfolk, UK), 11th-12th May 2025