Stigmus minutissimus RADOSZKOWSKI 1877; Spilomena vagans BLÜTHGEN 1953
There is some taxonomic uncertainty regarding this, and other, Spilomena species. Research for this Atlas suggests that BWARS initially took an outdated stance in considering this species to be distinct from Spilomena vagans Blüthgen (as per Richards, 1980 and Lomholdt, 1984). Dollfuss (1991), Falk (1991), Vikberg (2000) and Bitsch et al. (2001) all consider the two taxa to be one species: Spilomena troglodytes. This view is also being taken by the UK Species Inventory and implemented by the NBN Gateway. It is now accepted that Spilomena vagans is a synonym of troglodytes and so the Atlas will deal with all records under this latter name.
The highest density of records comes from Surrey and Kent, with increasingly fewer records scattered across East Anglia, the south-west, the Midlands, northern England, and Wales. It is also recorded from Ireland by O’Connor et al. (2009).
This species is known across Europe eastwards to Cyprus, Turkey and Israel (Dolfuss, 1991) and also Kazakhstan and Kyrgyzstan (Bitsch et al., 2001). Lomholdt (1984) (who, as an earlier author, maintained the split into the two taxa discussed above) implies a possible geographical split between the two species, with his vagans being found in all Nordic countries, but not common in the rest of Europe, whilst troglodytes was noted from only a handful of records in Fennoscandia and Denmark but widespread across the rest of the continent. This view that Spilomena vagans is a more Nordic beast is not supported by the stated distribution given by Richards (1980) of South Devon, Bedfordshire and Warwickshire.