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 Pteridophytanae Doweld (2001) Phylum †Cladoxylophyta Doweld (2001) [monotypic] see Division Monilophyta Cantino & Donoghue Class †Cladoxylopsida Novák (1930) - cladoxylopsids see Class Equisetopsida C.Agardh (1825) Order †Hyeniales W.Zimm. (1930) see Order Cladoxylales W.Zimm. (1930) Family †Calamophytaceae Kräusel & Weyland (1927) see Family Hyeniaceae Hirmer (1933)