Children (30 direct children, 4524 direct and indirect children):
Valvatida
(tree size 1564)
Paxillosida
(tree size 741)
Forcipulatida
(tree size 801)
Concentricycloidea
(tree size 7)
Notomyotida
(tree size 173)
Brisingida
(tree size 212)
Velatida
(tree size 215)
Palastericus
Valvatacea
Pustulosida
(tree size 5)
Hudsonasteridae
(tree size 7)
Platyasterida
(tree size 10)
Petraster
(tree size 2)
Palaeasteridae
(tree size 2)
Spinulosacea
(tree size 734)
Neoasteroidea
(tree size 8)
Protopalaeasteridae
Palasterinidae
Neopalaeasteridae
Lepidasteridae
Promopalaeasteridae
(tree size 2)
Fandasteridae
Monasteridae
Omanasteridae
Uranasteridae
Arthrasteridae
Hemizonida
(tree size 9)
Phanerozonida
Zorocallida
Aspidaster
(tree size 2)