• Tetrapods have four limbs along with fingers, toes, hips and shoulders.
  • They are able to walk on land and breath air.
  • Some examples include mammals, reptiles, amphibians, and birds.
  • It is thought that they derived from a particular group of bony fishes called the Osteichthyes.
  • Others believe that the lungfish known as Dipnoi are the sister group of tetrapods.
  • This subject is still under heavy debate.