Children (8 direct children, 90 direct and indirect children):
Paracrinoid
(tree size 5)
Paracrinoidea
Eocrinoidea
(tree size 23)
Cystoids
(tree size 3)
Cystoidea
Blastoid
(tree size 21)
Blastoidea
Rhombifera
(tree size 26)
Diploporita
(tree size 4)
Lepidocystidae
Felbabkacystidae