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 1 Order Crossopterygii Huxley, 1861 - lobe-finned fishes see Infraclass Crossopterygii Huxley, 1861 2 Order Dipnoi Müller, 1844 - lungfishes