Ophiarthrium Clark, 1915 accepted as Ophiarthrum Peters, 1851 (original description)
Ophinconis Clark, 1915 accepted as Ophioconis Lütken, 1869 (original description)
Ophiopezzella Clark, 1915 (original description)
Ophiophelus Clark, 1915 (original description)
Ophiopholes Clark, 1915 accepted as Ophiopholis Müller & Troschel, 1842 (original description)
Ophiophryxus Clark, 1915 accepted as Ophiophrixus H.L. Clark, 1911 (original description)
Ophiopsilia Clark, 1915 accepted as Ophiopsila Forbes, 1843 (original description)
Ophiuncus Clark, 1915 (original description)
Ophtonopthys Clark, 1915 accepted as Ophionephthys Lütken, 1869 (original description)
Ophyarthrum Clark, 1915 accepted as Ophiarthrum Peters, 1851 (original description)
Ophyoglupha Clark, 1915 accepted as Ophioglypha Lyman, 1860 accepted as Ophiura Lamarck, 1801 (original description)
Oppiomastus Clark, 1915 accepted as Ophiomastus Lyman, 1878 (original description)
Orphiomusium Clark, 1915 accepted as Ophiomusium Lyman, 1869 (original description)