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