Eukaryota  >  Metazoa  >  Echinodermata  >  Echinoidea  >  Clypeasteroida

Family	Genus	Species
Arachnoididae	1	1
Astriclypeidae	3	3
Clypeasteridae	3	15
Dendrasteridae	1	1
Echinarachniidae	1	1
Fibulariidae	3	5
Laganidae	3	5
Mellitidae	5	47
Scutellidae	1	1
Taiwanasteridae	1	1