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) 1 Family †Lidgettoniaceae J.M.Anderson & H.M.Anderson (1985) [monotypic] 2 Family †Parthaceae Doweld (2001) [monotypic] 3 Family †Denkaniaceae Doweld (2001) [monotypic]