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 Ginkgophyta Bessey (1907) [monotypic] see Phylum Ginkgophyta Bessey (1907)
         Class Ginkgoopsida Engl. (1897)
           Order †Karkeniales Doweld (2001)
             1 Family †Karkeniaceae Krassilov (1972)
             2 Family †Yimaiaceae Zhi Y.Zhou (1997) [monotypic]