Children (10 direct children, 22 direct and indirect children):
Iocrinidae
(tree size 2)
Heterocrinidae
Homocrinidae
Eustenocrinidae
Ramseyocrinidae
Cincinnaticrinidae
Allagecrinoidea
(tree size 3)
Pisocrinoidea
(tree size 5)
Belemnocrinoidea
(tree size 1)
Chirocrinus
(tree size 1)