Northern lamprey
| Northern lampreys | |
|---|---|
 |
|
| Sea lampreys (Petromyzon marinus) on a lake trout | |
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|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Hyperoartia (Petromyzontida) |
| Order: | Petromyzontiformes |
| Family: |
Petromyzontidae A. Risso, 1827 |
| Genera | |
|
Caspiomyzon |
|
Caspiomyzon
Entosphenus
Eudontomyzon
Ichthyomyzon
Lampetra
Lethenteron
Petromyzon
Tetrapleurodon
The northern lampreys (Petromyzontidae) are a family of lampreys. Northern lampreys have the highest number of chromosomes (164-174) among vertebrates.
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Wikipedia