Kingdom Chlorobiota C.Jeffrey ex Doweld (2001) - plants see Subkingdom Viridiplantae Caval.-Sm. (1981) Subkingdom Pteridobiotina Britton & A. Br. (1896) Superdivision Pteridophytanae Doweld (2001) [monotypic] see Superphylum Pteridophytanae Doweld (2001) Division Monilophyta Cantino & Donoghue Class Polypodiopsida Cronquist, Takht. & Zimmerm. (1966) - ferns Order Osmundales Bercht. & J.Presl (1820) [monotypic] Family Osmundaceae Martinov (1820) Genus †Thamnopteris Brongn. (1849)