Eukaryota  >  Metazoa  >  Echinodermata  >  Ophiuroidea

Family	Genus	Species
Amphilepididae	1	8
Amphiuridae	12	131
Asteronychidae	3	15
Asteroschematidae	4	42
Euryalidae	6	27
Gorgonocephalidae	25	63
Hemieuryalidae	3	3
Ophiacanthidae	22	147
Ophiactidae	7	140
Ophiochitonidae	2	6
Ophiocomidae	9	75
Ophiodermatidae	13	67
Ophiohelidae	2	41
Ophiolepididae	13	109
Ophioleucidae	0	50
Ophiomyxidae	11	50
Ophionereidae	1	47
Ophionereididae	1	3
Ophiopyrgidae	0	2
Ophioscolecidae	0	17
Ophiotrichidae	8	255
Ophiuridae	28	195