| Name | Children | Media (from resource) | Traits |
|---|---|---|---|
| Achoronemertes | 0 | 2 | 0 |
| Achoronemertes scoresbyi (Wheeler 1934) | 0 | 0 | 0 |
| Acteonemertes | 0 | 1 | 0 |
| Adenorhagas | 0 | 1 | 0 |
| Aetheorhynchus | 0 | 2 | 0 |
| Alaxinus | 0 | 2 | 0 |
| Amorphonemertes Cantell 1998 | 0 | 1 | 0 |
| Amorphonemertes kubergensis Cantell 1998 | 0 | 2 | 0 |
| Amphinemertes | 0 | 2 | 0 |
| Amphinemertes caeca (Coe 1901) | 0 | 4 | 0 |
| Amphiporus | 0 | 88 | 0 |
| Amphiporus angulatus (Müller 1774) (chevon amphiporus) | 0 | 12 | 0 |
| Amphiporus bimaculatus Coe 1901 | 0 | 13 | 0 |
| Amphiporus bioculatus McIntosh 1874 | 0 | 4 | 0 |
| Amphiporus cruentatus Verrill 1879 | 0 | 2 | 0 |
