Children (12 direct children, 171 direct and indirect children):
Diplopteraster
(tree size 10)
Pteraster
(tree size 73)
Hymenaster
(tree size 52)
Hymenasterides
(tree size 2)
Benthaster
(tree size 3)
Euretaster
(tree size 3)
Calyptraster
(tree size 5)
Amembranaster
(tree size 1)
Retaster
(tree size 9)
Hymenasterinae
Pterasterinae
Marsipaster
(tree size 1)