Sarcopterygii Romer, 1955
   Rhipidistia Cope, 1887
     Tetrapodomorpha Ahlberg, 1991
       Osteolepidida Boulenger, 1901 see [unranked] Osteolepidimorpha
         Tetrapoda Hatschek & Cori 1896 [Gauthier, Kluge & Rowe 1988]