| Amphiactis Matsumoto, 1915 |
| Amphiactis duplicata (Lyman, 1875) |
| Hemipholis Lyman, 1865 |
| Hemipholis cordifera (Bosc, 1802) |
| Hemipholis elongata (Say, 1825) |
| Hemipholis gracilis Verrill, 1867 |
| Histampica A.M. Clark, 1970 |
| Histampica duplicata (Lyman, 1875) |
| Ophiactidae Matsumoto, 1915 |
| Ophiactis Lütken, 1856 |
| Ophiactis arenosa Lütken, 1856 |
| Ophiactis duplicata (Lyman, 1875) |
| Ophiactis krebsii Lütken, 1856 |
| Ophiactis muelleri Lütken, 1856 |
| Ophiactis muelleri var. quinqueradia Ljungman, 1872 |
| Ophiactis oerstedi Lütken, 1856 |
| Ophiactis quinqueradia Ljungman, 1872 |
| Ophiactis rubropoda Singletary, 1973 |
| Ophiactis savignyi (Müller & Troschel, 1842) |
| Ophiactis simplex (Le Conte, 1851) |