Sarcopterygii Romer, 1955
   Rhipidistia Cope, 1887
     Dipnomorpha Ahlberg, 1991
       Dipnoiformes Cloutier, 1990 see [unranked] Dipnoi Müller, 1844
         1 [stem] Genus †Powichthys Jessen, 1975
         2.1 [stem] Genus †Youngolepis Zhang & Yu, 1981
         2.2 [crown] Dipnoi Müller, 1844 - lungfishes