| Kingdom: | Animalia |
| Phylum: | Chordata |
| Subphylum: | Vertebrata |
| Class: | Agnatha |
| Order: | Petromyzontiformes |
- Family
- Genus
- species – Common Name
- Ichthyomyzon
- castaneus – Chestnut Lamprey
- gagei – Southern Brook Lamprey
- Lampetra
- aepyptera – Least Brook Lamprey
- ayresii – River Lamprey
- planeri – European Brook Lamprey
- tridentata – Pacific Lamprey
- Mordacia
- mordax – Australian Short-head Lamprey
- Petromyzon
- marinus – Sea Lamprey
Petromyzontidae
