Clavelinidae
(tree size 225)
Polyclinidae
(tree size 537)
Didemnidae
(tree size 656)
Pseudodistomidae
(tree size 36)
Diazonidae
(tree size 53)
Polycitoridae
(tree size 158)
Ritterellidae
(tree size 3)
Holozoidae
(tree size 44)
Protopolyclinidae
(tree size 12)
Stomozoidae
(tree size 6)
Euherdmaniidae
Placentelidae
Vitrumidae
(tree size 2)