Domain Eucaryota
   Subdomain Chlorota Doweld (2001)
     Kingdom Chlorobiota C.Jeffrey ex Doweld (2001) - plants see Subkingdom Viridiplantae Caval.-Sm. (1981)
       Subkingdom Lycopodiobiotina Doweld (2001)
         Phylum †Zosterophyllophyta H.C.Bold (1973) see Subphylum Zosterophyllophytina H.P.Banks (1968)
           Class †Zosterophyllopsida Foster & Gifford (1974)
             Order †Cooksoniales Doweld (2001) [monotypic]
               Family †Cooksoniaceae H. Banks ex D.Edwards (1970)
                 1 Genus †Cooksonia W.H.Lang (1937)