Eukaryota  >  Metazoa  >  Echinodermata  >  Ophiuroidea

Family	Genus	Species
Amphilepididae	1	8
Amphiuridae	12	132
Asteronychidae	3	16
Asteroschematidae	4	52
Euryalidae	6	27
Gorgonocephalidae	25	67
Hemieuryalidae	3	4
Ophiacanthidae	22	154
Ophiactidae	7	140
Ophiochitonidae	2	6
Ophiocomidae	9	80
Ophiodermatidae	13	73
Ophiohelidae	2	41
Ophiolepididae	13	110
Ophioleucidae	0	50
Ophiomyxidae	11	53
Ophionereidae	1	49
Ophionereididae	1	3
Ophiopyrgidae	0	2
Ophioscolecidae	0	17
Ophiotrichidae	8	255
Ophiuridae	28	197