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 Pinophyta Cronquist, Takht. & Zimmerm. ex Reveal (1996) see Class Pinopsida Burnett (1835)
             Class Ginkgoopsida Engl. (1897)
               Subclass †Umaltolepididae Doweld (2001)
                 Order †Karkeniales Doweld (2001)
                   1 Family †Karkeniaceae Krassilov (1972)
                   2 Family †Yimaiaceae Zhi Y.Zhou (1997)