Vertebrates


 * (acorn worms)
 * †a
 * (starfish)
 * (vertebrates)
 *  or (s and other jawless fishes)
 *  (vertebrates with jaws)
 * † (extinct armoured fishes)
 * (cartilaginous fishes)
 * † (extinct spiny "sharks")
 * Superclass  (bony vertebrates)
 * (ray-finned bony fishes)
 * (lobe-finned fishes, including the tetrapods)
 * (amphibians, some ancestral to the )- now a paraphyletic group
 * (reptiles and birds)
 * (reptile-like mammals)
 *  or (s and other jawless fishes)
 *  (vertebrates with jaws)
 * † (extinct armoured fishes)
 * (cartilaginous fishes)
 * † (extinct spiny "sharks")
 * Superclass  (bony vertebrates)
 * (ray-finned bony fishes)
 * (lobe-finned fishes, including the tetrapods)
 * (amphibians, some ancestral to the )- now a paraphyletic group
 * (reptiles and birds)
 * (reptile-like mammals)
 * (reptile-like mammals)