| Order Gymnosomata Blainville, 1824 |
| Superfamily Clionoidea Rafinesque, 1815 |
| Family Clionidae Rafinesque, 1815 |
| Genus Clione Pallas, 1774 |
| Type species Clio limacina Phipps, 1774, by monotypy. |
| Order Gymnosomata Blainville, 1824 |
| Superfamily Clionoidea Rafinesque, 1815 |
| Family Clionidae Rafinesque, 1815 |
| Genus Clione Pallas, 1774 |
| Type species Clio limacina Phipps, 1774, by monotypy. |