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)
       Order †Urnatopteridales Danzé (1956), nom. ined. [monotypic] see Order Urnatopteridales Danzé ex Doweld (2001)
         1 Family †Urnatopteridaceae Danzé (1956), nom. ined. see Family Urnatopteridaceae Doweld (2001)