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 †Voltziopsida Doweld (2001) see Class Pinopsida Burnett (1835)
               1 Order †Voltziales Andreánszky (1954)
               2 Order †Ullmanniales Doweld (2001) [monotypic]
               3 Order †Podozamitales Sze Xingjian & Li Xingxue (1963) see Order Araucariales Gorozh. (1904)
               4 Order †Ferugliocladales Doweld (2001) [monotypic]
               4[''] Family †Buriadiaceae Pant (1977), incertae sedis
               5 Order †Palissyales Doweld (2001), incertae sedis [monotypic]