| Nominal Species (n = 4) | Present allocation (n = 3) | Ref. |
|---|---|---|
| Petromyzon acutidens Philippi, 1865 | Mordacia lapicida | 89241 |
| Caragola lapicida Gray, 1851 | Mordacia lapicida | 39873 |
| Petromyzon mordax Richardson, 1846 | Mordacia mordax | 7300 |
| Mordacia praecox Potter, 1968 | Mordacia praecox | 5259 |