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Ancestral Chordate ((Head (Vertebral column (Jaws (Lungs or lung derivates…

- - - - Hagfishes (Myxini)
      - Jaws
        
        Lampreys (Petromyzontiformes)
        
        Lungs or lung derivates
        
        Sharks and rays (Elasmobranchii)
        
        Lobed fns
        
        Ray finned fish (Actinopterygii)
        
        Legs
        
        Lobe-fins (Sarcopterygii)
        
        Amniotic
        
        Amphibians (Amphibia)
        
        Feathers
        
        2 more items...