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)
             Family †Karkeniaceae Krassilov (1972)
               1 Genus †Arctobaiera Florin (1936)
               2 Genus †Baiera Braun (1843), nom. cons.
               3 Genus †Baieroxylon Greguss (1961)
               4 Genus †Karkenia Archangelsky (1965)
               5 Genus †Sphenobaiera Florin (1936)
               6 Genus †Sphenobaieroanthus X.H.Yang (1986), nom. inval.
               7 Genus †Sphenobaierocladus Yang Xianhe (1986)