Children (9 direct children, 13 direct and indirect children):
Eucidaris tribuloides
(tree size 1)
Eucidaris metularia
Eucidaris clavata
Eucidaris thouarsii
(tree size 2)
Eucidaris australiae
Eucidaris galapagensis
Eucidaris coralloides
Eucidaris strobilata
Eucidaris strombilata
(tree size 1)