Children (8 direct children, 224770 direct and indirect children):
Chordata
(tree size 202848)
Chordates
Echinodermata
(tree size 20510)
Echinoderms
Ambulacraria
(tree size 9)
Hemichordata
(tree size 662)
Hemichordates
Vetulicolia
(tree size 17)
Xenambulacraria
Xenacoelomorpha
(tree size 714)
Saccorhytidae
(tree size 2)