the root (no rank)
Eukaryota (domain)
Metazoa (kingdom)
Chordata (phylum)
Craniata (subphylum)
Vertebrata (no rank)
Gnathostomata (superclass)
Sarcopterygii (class)
Tetrapoda (no rank)
Amphibia (class)
Caudata (order)
Urodela (alias)
[hide inferior taxa]
Ambystomatidae (family)
Amphiumidae (family)
Cryptobranchidae (family)
Dicamptodontidae (family)
Hynobiidae (family)
Plethodontidae (family)
Proteidae (family)
Rhyacotritonidae (family)
Salamandridae (family)
Sirenidae (family)