Tetrapod

The superclass Tetrapoda (Auncient Greek τετραπόδηs tetrapodēs, "fower-fittit"), or the tetrapods, comprises the first fower-limbed vertebrates an thair descendants, includin the livin an extinct amphibians, reptiles, birds, an mammals.

Tetrapods
Representatives o the fower classes of extant tetrapods, (clockwise frae upper left): a frog (an amphibian), a hoatzin (a bird), a skink (a reptile), an a moose (a mammal)
Scientific classification
Kinrick:	Animalia
Phylum:	Chordata
Clade:	Stegocephalia
Supercless:	Tetrapoda authority unkent, afore 1912
Subgroups
Class Amphibia Series Amniota Clade Sauropsida Class Reptilia Class Aves Clade Synapsida Class Mammalia