Aplysiida [Anaspidea]
Superfamily: Akeroidea
Family: Akeridae
–No subordinate taxa
Superfamily: Aplysioidea
Family: Aplysiidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Phyllaplysia smaragda | Clark, 1977 | Manatee grass sea hare, Emerald seaslug | 1981 or 1982 | Florida, USA | Extinct | Access |