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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.

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