Nemertea (Ribbon Worms)
Class: Enopla
Order: Hoplonemertea
Family: Prosorhochmidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Antiponemertes allisonae | (Moore, 1973) | Menzies Bay terrestrial ribbon worm | 1961 | Banks Peninsula, South Island, New Zealand | Extinct | Access |
| Geonemertes rodericana | Gulliver, 1879 | Rodrigues terrestrial ribbon worm | 1918 | Rodrigues, Mascarene Islands | Extinct | Access |
| Prosadenoporus agricola | Willemoes-Suhm, 1874 | Bermuda Islands mangrove ribbon worm | 1966 | Bermuda | Extinct | Access |
Family: Tetrastemmatidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Prostoma graecense | (Böhming, 1892) | - | (rediscovered) | Lake Xochimilco, Mexico | Rediscovered | Access |