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 †Progymnospermophyta Bold et al. see Phylum Progymnospermophyta Lang (1925) Class †Progymnospermopsida Beck (1960) see Clade Pan-Spermatophyta Cantino & Donoghue 2007 [Cantino, Doyle & Donoghue 2020] Order †Archaeopteridales W.Zimm. (1930) [monotypic] Family †Archaeopteridaceae Nicholson & Lydekker (1889) Genus †Actinoxylon Matten (1968)