Kingdom [Animalia] Linnaeus, 1758 - animals
Subkingdom Metazoa Haeckel, 1874
see Kingdom Animalia Linnaeus, 1758
Division Eumetazoa Butschli, 1910
see Subkingdom Eumetazoa Butschli, 1910
Subdivision Bilateralia
Phylum Chordata Bateson, 1885 - chordates
Subphylum Vertebrata Cuvier, 1812 - vertebrates
Superclass Agnatha Haeckel, 1895
see Class Agnatha Cope, 1889
Class Cyclostomata Richards
Subclass Petromyzones
see Order Petromyzontiformes Berg, 1940
Family Petromyzonidae Bonaparte, 1831
see Family Petromyzontidae Bonaparte, 1832
1 Subfamily Petromyzoninae
see Subfamily Petromyzontinae
2 Subfamily Mordacinae
see Subfamily Mordaciinae