Domain Eucaryota Subdomain Chlorota Doweld (2001) Kingdom Chlorobiota C.Jeffrey ex Doweld (2001) - plants see Subkingdom Viridiplantae Caval.-Sm. (1981) Subkingdom Pteridobiotina Britton & A. Br. (1896) Superphylum Cycadophytanae Doweld (2001) Phylum †Cycadeoideophyta T.N.Taylor (1981) [monotypic] see Class Cycadeoideopsida D.H.Scott (1923) Class †Cycadeoideopsida D.H.Scott (1923) [monotypic] Order †Cycadeoideales E.W.Berry (1916) Family †Cycadeoideaceae Buckland (1833)