(Ichthyomyzon) (Ichthyomyzon) is a biological genus in the family Petromyzontidae (Lampreys) and order Petromyzontiformes (Lampreys).
Ichthyomyzon greeleyi
Ichthyomyzon castaneus
Ichthyomyzon fossor
Ichthyomyzon bdellium
Ichthyomyzon unicuspis
Ichthyomyzon gagei
Caspiomyzon
Entosphenus
Eudontomyzon
Ichthyomyzon
Lampetra
Lethenteron
Petromyzon
Tetrapleurodon