| Order Thecosomata Blainville, 1824 |
| Superfamily Limacinoidea Gray, 1840 |
| Family Limacinidae Gray, 1840 |
| Genus Limacina Bosc, 1817 |
| Type species Clio helicina (Phipps, 1774), by monotypy. |
| Order Thecosomata Blainville, 1824 |
| Superfamily Limacinoidea Gray, 1840 |
| Family Limacinidae Gray, 1840 |
| Genus Limacina Bosc, 1817 |
| Type species Clio helicina (Phipps, 1774), by monotypy. |