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 †Pachytestopsida Doweld (2001) Order †Pachytestales Doweld (2001) Family †Polylophospermaceae Doweld (2001) [monotypic] 1 Genus †Polylophospermum Brongn. (1874)