It was ranked as an order under class Amphibia by Watson in 1920 and as a superorder by Romer in 1947.

Amphibians (class Amphibia, from Amphi- meaning "on both sides" and -bios meaning "life") are a class of vertebrate animals including animals such as toads, frogs, caecilians, and salamanders.

The majority of amphibians (class Amphibia) have an aquatic larval stage, like a tadpole, but then live as terrestrial adults, and may return to the water to mate.

For that reason, these organisms were placed in the class Amphibia (Greek for "double life") within the vertebrate subphy-lum.

The taxonomic group Urodela refers to the extant species of salamanders and newts that fall under the class Amphibia.

Reptiles belong to the class Reptilia while amphibians belong to the class Amphibia.

Traditionally, the class Amphibia includes all tetrapod vertebrates that are not amniotes.

As a very basal (primitive) tetrapod, it falls under the traditional class Amphibia in Linnaean taxonomy.

Amphibians are members of the class Amphibia.