Quinquecapsulariidae
(tree size 2)
Heptacladidae
(tree size 2)
Hexalonchidae
(tree size 11)
Rhizosphaeridae
Saturnalidae
(tree size 19)
Inaniguttidae
(tree size 6)
Palaeolithocycliidae
(tree size 1)
Kungalariidae
Spongentactiniidae
Spongosaturnaloididae
(tree size 3)
Entactiniidae
(tree size 7)
Thalassothamnidae
Eptingiidae
(tree size 4)
Polyentactiniidae
(tree size 5)
Proventocitidae
(tree size 2)
Capnuchosphaeridae
(tree size 5)
Multiarcusellidae
(tree size 8)
Pylentonemidae
(tree size 3)
Hindeosphaeridae
Protoentactiniidae
Parentactiniidae
Palaeoscenidiidae
Hollandocachoniidae
Centrocubidae
Pentactinocarpidae
Hexastylidae
Haplentactiniidae
(tree size 2)
Isometractiniidae
Tetrentactiniidae
Sphaeroentactiniidae
Odoghertitidae
Triumbraculidae
Protoentactiniacea