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 †Euporosteidae Romer, 1966, nom. nud. see Family Diplocercididae Berg, 1940