[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 †Rhizodontida Andrews & Westoll, 1970 [monotypic] see [unranked] Rhizodontida Andrews & Westoll, 1970
               Order †Rhizodontiformes Andrews & Westoll, 1970 [monotypic]
                 Family †Rhizodontidae Traquair, 1881 - rhizodontids
                   1 Genus †Rhizodus Owen, 1840