Phylum Chordata Bateson, 1885 - chordates
   Subphylum Vertebrata Cuvier, 1812 - vertebrates see Infraphylum Vertebrata Lamarck, 1801
     Pisces
       Class Sarcopterygii Romer, 1955 - lobe-finned fishes and tetrapods see [unranked] Sarcopterygii Romer, 1955
         Order Crossopterygii Huxley, 1861 - lobe-finned fishes see Infraclass Crossopterygii Huxley, 1861
           Family †Canowindridae Young, Long & Ritchie, 1992
           Family †Coelacanthidae Agassiz, 1844
           Family †Diplocercididae Berg, 1940
           Family †Euporosteidae Romer, 1966, nom. nud. see Family Diplocercididae Berg, 1940
           Family †Eusthenopteridae Berg, 1955 see Family Tristichopteridae Cope, 1887
           Family †Hadronectoridae Lund & Lund, 1984
           Family †Holoptychiidae Giebel, 1847
           Family Latimeriidae Berg, 1940 - coelacanths
           Family †Laugiidae Berg, 1940
           Family †Onychodontidae Woodward, 1891
           Family †Osteolepidae see Family Osteolepididae Cope, 1887
           Family †Panderichthyidae Vorobyeva, 1968 - panderichthyids
           Family †Porolepidae Berg, 1940 see Family Porolepididae Berg, 1940
           Family †Powichthyidae Jessen, 1980
           Family †Rhabdodermatidae Berg, 1955
           Family †Rhizodontidae Traquair, 1881 - rhizodontids
           Family †Rhizodopsidae Berg, 1940