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 †Caytoniopsida H.H.Thomas ex Frenguelli (1946) [monotypic] Order †Caytoniales E.Wulff (1926) [monotypic] Family †Caytoniaceae Kräusel (1926) Genus †Scoresbya T.M.Harris (1932)