Petromyzontidae | |
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Sea lampreys (Petromyzon marinus) on a lake trout | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Petromyzontida |
Order: | Petromyzontiformes |
Family: | Petromyzontidae A. Risso, 1827 |
Type species | |
Petromyzon marinus | |
Genera | |
Caspiomyzon |
Petromyzontidae are a family of lampreys native to the Northern Hemisphere, comprising the vast majority of living lampreys.[1] Petromyzontids have the highest number of chromosomes (164–174) among vertebrates.[2]