[1] It was merged into Tetrablemmidae in 1958,[2][3] then raised back to family status after a large phylogenetic study in 2017.

[4] The family Pacullidae contains three-clawed spiders with six eyes, lacking a cribellum.

They resemble spiders from the family Tetrablemmidae in some respects but are much larger, always exceeding 5 mm long, have a very wrinkled (rugose) cuticle, and females do not have large membranous receptacles.

Within this clade, it groups with four other families, including Tetrablemmidae, but is distinct from the latter, being most closely related to Diguetidae.

[4] Tetrablemmidae Plectreuridae Diguetidae Pacullidae Pholcidae As of April 2019[update], the World Spider Catalog accepts the following genera and species:[5]