Phylum [Vertebrata] (Lamarck, 1801)
   Class Reptilia Linnaeus, 1758 - reptiles
     Subclass †Synapsida Osborn, 1903 - synapsids see Class Synapsida Osborn, 1903
       Order †Pelycosauria Cope, 1878 - pelycosaurs
         Family †Edaphosauridae Cope, 1882
           Genus †Edaphosaurus Cope, 1883