Children (14 direct children, 74 direct and indirect children):
Astropyga
(tree size 6)
Echinothrix
(tree size 3)
Centrostephanus
(tree size 14)
Diadema
(tree size 17)
Diadema (sea urchin)
Chaetodiadema
(tree size 6)
Eodiadema
(tree size 2)
Eremopyga
(tree size 2)
Goniodiadema
(tree size 1)
Leptodiadema
(tree size 1)
Palaeodiadema
(tree size 3)
Australidiadema
(tree size 1)
Sierradiadema
(tree size 1)
Centrechinus
(tree size 1)
Garelia
(tree size 2)