Kingdom Chlorobiota C.Jeffrey ex Doweld (2001) - plants see Subkingdom Viridiplantae Caval.-Sm. (1981)
   Subkingdom Pteridobiotina Britton & A. Br. (1896)
     Superdivision Cycadophytanae Doweld (2001) see Superphylum Cycadophytanae Doweld (2001)
       Division Pinophyta Cronquist, Takht. & Zimmerm. ex Reveal (1996) [monotypic]
         Class Pinopsida Burnett (1835)
           Order †Cordaitales D.H.Scott (1909) [monotypic]
             Family †Cordaitaceae Grand'Eury (1877)
               1 Genus †Cordaites Unger (1850)
               2 Genus †Cardiocarpus Brongn. (1880), nom. cons.
               3 Genus †Cordaicarpus Seward (1917)
               4 Genus †Samaropsis Göpp. (1864)