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 †Moresnetiopsida Doweld (2001) Order †Pullarithecales Doweld (1998) Family †Calathiopsidaceae Doweld (2001) 1 Genus †Calathiops Göpp. (1865) 2 Genus †Nudospermopteris Doweld (2003)