Fishes Class Sarcopterygii Romer, 1955 - lobe-finned fishes and tetrapods see Clade Sarcopterygii Romer, 1955 1 Order Coelacanthiformes Jarvik, 1942 - coelacanths 2 Order Ceratodontiformes Berg, 1940 - living lungfishes 3 Order Lepidosireniformes Savage, 1951 see Order Dipnoi Müller, 1844