Class Chondrichthyes
    Subclass Holocephali
        Order Chimaeriformes
 
 



Class Sarcopterygii
       Superorder Crossopterygii


picture of a lungfish
Class Sarcopterygii
       Superorder Dipnoi



Class Amphibia
    Subclass Lissamphibia
       Order Apoda
 


Class Reptilia
    Subclass Diapsida
        Superorder Lepidosauria
            Order Rhynchocephalia
 



Class Reptilia
    Subclass Diapsida
       Superorder Lepidosauria
           Order Squamata
 
 
 
 
 
 


Class Mammalia
    Subclass Prototheria
        Order Monotremata