the root (no rank)
Eukaryota (domain)
Metazoa (kingdom)
Chordata (phylum)
Craniata (subphylum)
Vertebrata (no rank)
Petromyzontiformes (order)
Petromyzontidae (family)
lampreys (common name)
[hide inferior taxa]
Entosphenus japonicus (species)
Geotria australis (species)
Ichthyomyzon (genus)
Lampetra (genus)
Lethenteron japonicum (species)
Mordacia mordax (species)
Petromyzon marinus (species)
Petromyzontidae gen. sp. (species)