Eukaryota  >  Metazoa  >  Echinodermata

Class	Order	Family	Genus	Species
Asteroidea	8	42	242	1198
Crinoidea	6	33	119	375
Echinoidea	15	53	159	908
Holothuroidea	6	22	131	988
Ophiuroidea	4	22	171	2317