Children (13 direct children, 31 direct and indirect children):
Aglaophenidae
Calycopsidae
Clavidae
(tree size 1)
Clavopsellidae
Eleutheridae
Eucodonidae
Halocordylidae
(tree size 2)
Halopteriidae
Plumularidae
Tiaropsidae
(tree size 15)
Velellidae
Hydrida
Inocaulis