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 †Botryopteridiophyta Doweld (2001) see Division Monilophyta Cantino & Donoghue Class †Urnatopteridopsida Doweld (2001) see Class Marattiopsida Doweld (2001) Order †Urnatopteridales Danzé ex Doweld (2001) [monotypic] see Order Stauropteridales Emberger (1944) 1 Family †Urnatopteridaceae Doweld (2001) [monotypic] see Family Stauropteridaceae Hirmer (1927)