(Petromyzon) (Petromyzon) is a biological genus in the family Petromyzontidae (Lampreys) and order Petromyzontiformes (Lampreys).
Petromyzon marinus
Caspiomyzon
Entosphenus
Eudontomyzon
Ichthyomyzon
Lampetra
Lethenteron
Petromyzon
Tetrapleurodon