Cephalaspidea (Headshield Slugs and Bubble Snails)
Family: Haminoeidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Cyltchnatys campanula | Burn, 1978 | Holocene? | Western Australia, Australia | Missing | Access | |
| Nipponatys tumida | Burn, 1978 | Holocene? | Western Australia, Australia | Missing | Access |