the root (no rank)
Eukaryota (domain)
Metazoa (kingdom)
Chordata (phylum)
Craniata (subphylum)
Vertebrata (no rank)
Petromyzontiformes (order)
Petromyzontidae (family)
Lampetra (genus)
Lampetra tridentata (species)
Entosphenus tridentatus (alias)
[hide inferior taxa]