Eukaryota  >  Metazoa  >  Echinodermata

Class	Order	Family	Genus	Species
Asteroidea	8	42	243	1199
Crinoidea	6	33	119	380
Echinoidea	15	53	159	909
Holothuroidea	6	22	132	990
Ophiuroidea	4	22	171	2318