Kingdom [Plantae] Haeckel (1866) - plants
   Division Pteridophyta Schimp. (1879) see Subphylum Pteridophytina (Eichler) Cavalier-Sm. (1998)
     Class Filicopsida C.Agardh (1822) - ferns see Class Polypodiopsida Cronquist, Takht. & Zimmerm. (1966)
       01 Order †Cladoxylales W.Zimm. (1930) [monotypic]
       02 Order †Ibykales [monotypic]
       03 Order †Coenopteridales Delevoryas & Morgan
       04 Order †Botryopteridales
       05 Order †Urnatopteridales Danzé (1956), nom. ined. [monotypic] see Order Urnatopteridales Danzé ex Doweld (2001)
       06 Order †Crossothecales Danzé, nom. inval. [monotypic] see Order Crossothecales Danzé ex Doweld (2001)
       08 Order Marattiales Link (1833)
       09 Order Osmundales Bercht. & J.Presl (1820) [monotypic]
       10 Order Filicales Dumort. (1829), nom. illeg. see Order Polypodiales Link (1833)