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 Pinophyta Cronquist, Takht. & Zimmerm. ex Reveal (1996) [monotypic]
         Class Pinopsida Burnett (1835)
           Order †Czekanowskiales Novák (1972) [monotypic]
             Family †Czekanowskiaceae Samylina (1970)
               01 Genus †Culgoweria Florin (1936)
               02 Genus †Czekanowskia Heer (1876)
               03 Genus †Desmiophyllum Lesq. (1878)
               04 Genus †Schweitzeria Shipunov & D.D.Sokoloff (2003)
               05 Genus †Ixostrobus Raciborski (1892)
               06 Genus †Leptostrobus Heer (1876)
               07 Genus †Phoenicopsis Heer (1876)
               08 Genus †Solenites Lindl. & Hutton (1834)
               09 Genus †Sphenarion T.M.Harris & J. Mill. (1974)
               10 Genus †Tianshia Z. Zhou & B. Zhang (1998)
               11 Genus †Vachrameevia (Kiritch. & Samyl.) A.V.Novikov & B. Barabasz-Krasny (2015), stat. inval. see Subgenus Czekanowskia subg. Vachrameevia Kiritch. & Samyl. (1991)
               12 Genus †Windwardia Florin (1936)