Children (9 direct children, 10 direct and indirect children):
Ctenocidaris speciosa
Ctenocidaris perrieri
Ctenocidaris polyplax
Ctenocidaris spinosa
Ctenocidaris rugosa
Ctenocidaris aotearoa
Ctenocidaris geliberti
Eurocidaris
(tree size 1)
Ctenocidaris pawsoni