Phylum Chordata Bateson, 1885 - chordates
   Subphylum Vertebrata Cuvier, 1812 - vertebrates
     Pisces
       Class Sarcopterygii Romer, 1955 - lobe-finned fishes and tetrapods see Clade Sarcopterygii Romer, 1955
         Order Crossopterygii Huxley, 1861 - lobe-finned fishes see Infraclass Crossopterygii Huxley, 1861
           Family †Canowindridae Young et al., 1992
           Family †Coelacanthidae Agassiz, 1838
           Family †Diplocercididae Berg, 1940
           Family †Euporosteidae
           Family †Eusthenopteridae Young et al., 1992 see Family Tristichopteridae Cope, 1887
           Family †Hadronectoridae Lund & Lund, 1984
           Family †Holoptychiidae Owen, 1859
           Family Latimeriidae Berg, 1940 - coelacanths
           Family †Laugiidae Berg, 1940
           Family †Onychodontidae Woodward, 1891
           Family †Osteolepidae see Family Osteolepididae Cope, 1887
           Family †Panderichthyidae Vorobyeva, in Vorobyeva & Lyarskaya, 1968 - panderichthyids see Family Elpistostegidae Romer, 1947
           Family †Porolepidae
           Family †Powichthyidae Jessen, 1975
           Family †Rhabdodermatidae Berg, 1958
           Family †Rhizodontidae Traquair, 1881 - rhizodontids
           Family †Rhizodopsidae