Children (11 direct children, 4546 direct and indirect children):
Phrynophiurida
(tree size 6)
Oegophiurida
(tree size 8)
Stenasteridae
(tree size 1)
Aspidosomatidae
Encrinasteridae
(tree size 5)
Cheiropterasteridae
Euzonosomatidae
Calclyridae
Hallasteridae
Myophiuroidea
(tree size 4508)
Ophiurella
(tree size 7)