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 †Pteridospermatophyta Meyen
         Class †Dyctiopteridiopsida A.V.Novikov & B. Barabasz-Krasny (2015), orth. inval. see Class Dictyopteridiopsida Doweld (2001)
           Order †Lidgettoniales Doweld (2001)
             Family †Lidgettoniaceae J.M.Anderson & H.M.Anderson (1985) [monotypic]
               1 Genus †Lidgettonia H.H.Thomas (1958)