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 Magnoliophyta Cronquist, Takht. & Zimmerm. ex Reveal (1996) see Infraphylum Angiospermae auct.
             Subphylum †Leptostrobophytina Doweld (2001) [monotypic]
               Class †Leptostrobopsida Doweld (2001) [monotypic]
                 Order †Leptostrobales S.V.Meyen (1987) [monotypic] see Order Czekanowskiales Novák (1972)
                   Family †Leptostrobaceae S.V.Meyen (1978) see Family Czekanowskiaceae Samylina (1970)
                     1 Genus †Leptostrobus Heer (1876)