Domain Eucaryota
   Subdomain Chlorota Doweld (2001)
     Kingdom Chlorobiota C.Jeffrey ex Doweld (2001) - plants see Subkingdom Viridiplantae Caval.-Sm. (1981)
       Subkingdom Pteridobiotina Britton & A. Br. (1896)
         Superphylum Cycadophytanae Doweld (2001)
           Phylum †Peltaspermophyta Doweld (2001) see Division Pteridospermatophyta Meyen
             1 Class †Peltaspermopsida Doweld (2001)
             2 Class †Arberiopsida Doweld (2001)
             2[''] Family †Schmeissneriaceae Zhi Y.Zhou (2000)
             3 Class †Dictyopteridiopsida Doweld (2001)
             4 Class †Pentoxylopsida D.D.Pant ex Doweld (2001), nom. inval. [monotypic] see Class Pentoxylopsida D.D.Pant (1959)