Phylum [Tracheophyta] Sinnott ex Caval.-Sm. (1998) - vascular plants
   Subphylum Polypodiophytina Reveal (1996) [monotypic]
     Class Polypodiopsida Cronquist, Takht. & Zimmerm. (1966) - ferns
       Subclass Marattiidae Klinge (1882) [monotypic]
         Order Marattiales Link (1833) [monotypic]
           Family Marattiaceae Kaulf. (1824), nom. cons. - marattioids
             Genus Danaea Sm. (1793), nom. cons.