In some species the males have a spur on their legs, which they will show if provoked.
Idiopidae build burrows, and some species close these with a door.
The about 2 cm long Prothemenops siamensis from Thailand builds its retreat in a streamside vertical earth bank in lower montane rain forest. Each burrow had two or three entrances that lead into a main tube. Its lateral posterior spinnerets are elongated.
The categorization into subfamilies follows Raven (1985)