Nemertea (Ribbon Worms)
Class: Arhynchocoela
—No subordinate taxa
Class: Hoplonemertea
Order: Monostilifera
Family: Acteonemertidae
| 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 | Missing | Access |
Family: Prosorhochmidae
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Prosadenoporus agricola | (Willemoes-Suhm, 1874) | Bermuda Islands mangrove ribbon worm | 1966 | Bermuda | Missing | Access |
Family: incertae sedis
| Scientific Name | Author/s | Common Name | Last Record | Distribution | Status | Taxon Profile |
| Geonemertes rodericana | (Gulliver, 1879) | Rodrigues terrestrial ribbon worm | 1918 | Rodrigues, Mascarene Islands | Extinct | Access |
Class: Palaeonemertea
—No subordinate taxa
Class: Pilidiophora
—No subordinate taxa
Statistics
| Conservation status | Number of taxa (in percentage) |
| Extinct | 1 (3.33%) |
| Missing | 2 (66.67%) |
| Extinct in the Wild | 0 |
| Possibly Extinct in the Wild | 0 |
| Globally Rediscovered | 0 |
| Rediscovered in the Wild | 0 |
| Hypothetical | 0 |
| Invalid | 0 |
| Erroneously listed | 0 |
| Uncertain status | 0 |
| Total | 3 |