Family-level taxonomy of all dipnomorphs  

<==o †Porolepiformes Jarvik, 1942
   |--o †Porolepidae
   |  |-- †Heimenia ensis ØRvik, 1969
   |  `--o †Porolepis [Gyrolepis] L.-M. Dev. Eu. Spitz. NAs.
   |     |-- †P. brevis
   |     |-- †P. posnaniensis
   |     `-- †P. siegenensis Gross, 1935
   `--o †Holoptychioidea
      `--o †Holoptychidae
         |?- †Ventalepis
         |?- †Duffichthys
         |--o †Glyptolepis [?Hamodus, Plyphlepis, ?Sclerolepis]
         |  |-- †G. leptopterus
         |  |-- †G. groenlandica Jarvik, 1972
         |  |-- †G. baltica Gross
         |  `-- †G. paucidens
         |--o †Holoptychus [?Apedodus, ?Apendulus, ?Dendrodus, Holoptychius, Lamnodus]
         |  |-- †H. nobilissimus [Holoptychius]
         |  `-- †H. quebecensis
         |-- †Laccognathus panderi Gross
         `-- †Pseudosauripterus

Reference(s):