Eukaryota  >  Metazoa  >  Echinodermata

Class	Order	Family	Genus	Species
Asteroidea	8	42	246	1209
Crinoidea	6	33	119	387
Echinoidea	15	54	162	916
Holothuroidea	6	22	132	1015
Ophiuroidea	4	22	171	2328