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)
           a Order †Trichopytiales A.V.Novikov & B. Barabasz-Krasny (2015), orth. inval. see Order Trichopityales Doweld (2001)
           b Order †Peltaspermales Delevoryas (1979)
           c Order †Sporophyllitales Doweld (2001)
           d Order †Umkomasiales Doweld (2001)