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 Dipnoi Müller, 1844 - lungfishes Family Lepidosirenidae Stirton, 1953 - South American lungfishes