Wikipedia
Fornicephalae
The Fornicephalae are an infraorder of mygalomorph spiders, consisting of eight families with ca. 70 genera and 700 species.
- Atypoidea ( Antrodiaetidae and Atypidae)
- Cyrtauchenioidea
- Idiopoidea
- Migoidea ( Actinopodidae and Migidae)
They are opposed to the Tuberculotae, which make up the rest of the Mygalomorphae.
However, according to (Goloboff, 1993), neither group appears to be monophyletic.