Children (8 direct children, 366 direct and indirect children):
Toxopneustidae
(tree size 73)
Parechinidae
(tree size 8)
Echinidea
(tree size 8)
Temnopleuridea
(tree size 257)
Aeolopneustes
Porosoma
(tree size 6)
Coptosoma desor, 1855
(tree size 1)
Triplacidia
(tree size 5)