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 †Crossothecales Danzé, nom. inval. [monotypic] see Order Crossothecales Danzé ex Doweld (2001)
         Family †Crossothecaceae Danzé, nom. inval. see Family Crossothecaceae Doweld (2001), nom. cons. prop.