Hemiuroidea
(tree size 389)
Arnolidae
(tree size 3)
Tetrasteridae
(tree size 2)
Lobatovitelliovariidae
(tree size 2)
Mabiaramidae
(tree size 2)
Dictysarcidae
(tree size 13)
Albulatrematidae
(tree size 2)
Oesophagicolidae
(tree size 2)
Halipegidae
(tree size 57)
Cylindrorchiidae
(tree size 2)
Areobiotrematidae
(tree size 2)
Azygioidea