Children (8 direct children, 10 direct and indirect children):
Heliocidaris robertsi
Heliocidaris erythrogramma
(tree size 2)
Heliocidaris crassispina
Anthocidaris crassispina
Heliocidaris tuberculata
Heliocidaris bajulus
Heliocidaris australiae
Heliocidaris chloroticus
Heliocidaris ludbrookae