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 †Pteridospermatophyta Meyen
         Class †Peltaspermopsida Doweld (2001)
           Order †Peltaspermales Delevoryas (1979)
             Family †Peltaspermaceae Pilg. & Melchior (1954), nom. cons. prop.
               Genus †Stiphorus S.V.Meyen (1983)