Bathyuridae
(tree size 43)
Brachymetopidae
(tree size 5)
Crepicephalidae
(tree size 3)
Dimeropygidae
(tree size 9)
Ehmaniellidae
Holotrachelidae
Hystricuridae
(tree size 5)
Marjumiidae
(tree size 1)
Scharyiidae
Tricrepicephalidae
(tree size 2)