Permosialidae
(tree size 19)
Permembiidae
(tree size 6)
Letopalopteridae
(tree size 2)
Permonkidae
Perloblattidae
Epimastacidae
Tologopteridae
Farianopteridae
Kaltanelmoidae
Hypoperlidae
Martynopsocidae
Stenoneurellidae
Ischnoneuridae
Adiphlebiidae
Perielytridae
Asiuropidae
Sojanoperidae