How do you classify amphibians?

Traditionally the amphibians have included all tetrapods that are not amniotes. They are divided into three subclasses, of which two are only known as extinct subclasses: * Subclass Labyrinthodontia (diverse Paleozoic and early Mesozoic group) * Subclass Lepospondyli (small Paleozoic group) * Subclass Lissamphibia (frogs, toads, salamanders, newts, etc.)
Amphibians birds and reptiles are in the tetrapods class
The class of an amphibian is Amphibia
Amphibia.
The class is called amphibia.