[Phylum] Chordata Bateson, 1885 - chordates
   Subphylum Craniata auct.
     Infraphylum Vertebrata Lamarck, 1801 - vertebrates
       Superclass Gnathostomata Gegenbaur, 1874 - jawed vertebrates
         Class Osteichthyes Huxley, 1880 - bony fishes and tetrapods see Clade Osteichthyes Huxley 1880 [Moore & Near 2020]
           Subclass Sarcopterygii Romer, 1955 - lobe-finned fishes and tetrapods see [unranked] Sarcopterygii Romer, 1955
             Infraclass Dipnomorpha Ahlberg, 1991 see [unranked] Dipnomorpha Ahlberg, 1991
               Superorder Dipnoi Müller, 1844 see Class Dipneusti
                 1 Family †Powichthyidae Jessen, 1980
                 2 Family †Youngolepididae Gardiner, 1984
                 3 Order †Diabolepidiformes [monotypic]
                 4 Order †Dipnorhynchiformes
                 5 Order †Dipteriformes
                 6 Order †Ctenodontiformes
                 7 Order Ceratodontiformes Berg, 1940 - living lungfishes and their fossil relatives