Sarcopterygii Romer, 1955 Rhipidistia Cope, 1887 Tetrapodomorpha Ahlberg, 1991 Osteolepidida Boulenger, 1901 see [unranked] Osteolepidimorpha 1 †"Osteolepiformes" Berg, 1937 2.1 †Elpistostegalia Camp & Allison, 1961 2.2 Tetrapoda Hatschek & Cori 1896 [Gauthier, Kluge & Rowe 1988]