Cheiracanthiidae (long-legged sac spiders)

Both of my spider field guides show the genus Cheiracanthium as members of the family Clubionidae but the NBN Atlas (which I think follows the UK Species Index) currently has the genus in family Miturgidae. Several other online references have the genus placed in the family Cheiracanthiidae and at least one source states that placement in Cheiracanthiidae follows earlier placements in Clubionidae and Miturgidae.

Cheiracanthium erraticum