Eukaryota  >  Metazoa  >  Echinodermata  >  Ophiuroidea

Family	Genus	Species
Amphilepididae	1	8
Amphiuridae	33	135
Asteronychidae	3	16
Asteroschematidae	4	53
Euryalidae	6	28
Gorgonocephalidae	40	67
Hemieuryalidae	6	4
Ophiacanthidae	55	155
Ophiactidae	9	140
Ophiochitonidae	2	6
Ophiocomidae	9	80
Ophiodermatidae	21	75
Ophiohelidae	2	41
Ophiolepididae	27	110
Ophioleucidae	0	51
Ophiomyxidae	28	53
Ophionereidae	1	49
Ophionereididae	1	3
Ophiopyrgidae	0	2
Ophioscolecidae	0	18
Ophiotrichidae	13	256
Ophiuridae	51	199