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 †Moresnetiophyta Doweld (2001) see Division Pteridospermatophyta Meyen
             Class †Moresnetiopsida Doweld (2001)
               Order †Pullarithecales Doweld (1998)
                 Family †Gnetopsidaceae Doweld (2001) [monotypic]
                   1 Genus †Gnetopsis Renault & Zeiller (1884)