n = 3
| Scientific Name | Author | Valid Name | Family | English Name |
|---|---|---|---|---|
| Mordacia lapicida | (Gray, 1851) | Mordacia lapicida | Mordaciidae | Chilean lamprey |
| Mordacia mordax | (Richardson, 1846) | Mordacia mordax | Mordaciidae | Shorthead lamprey |
| Mordacia praecox | Potter, 1968 | Mordacia praecox | Mordaciidae | Non-parasitic lamprey |