Children (8 direct children, 185785 direct and indirect children):
Chordata
(tree size 171487)
Chordate
Echinodermata
(tree size 13372)
Echinoderms
Ambulacraria
(tree size 9)
Hemichordata
(tree size 243)
Hemichordates
Vetulicolia
(tree size 15)
Xenambulacraria
Xenacoelomorpha
(tree size 649)
Saccorhytidae
(tree size 2)