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
             Class †Peltaspermopsida Doweld (2001)
               Order †Umkomasiales Doweld (2001)
                 Family †Umkomasiaceae Petriella (1981), nom. cons. prop.
                   Genus †Umkomasia H.H.Thomas (1931)