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 †Lyginopteridopsida Novák (1961) Order †Callistophytales Rothwell (1981) Family †Callistophytaceae Stidd & J.W.Hall (1970), nom. cons. prop. Genus †Callistophyton Delevoryas & Morgan (1954)