living organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Superkingdom Eukaryotae see Domain Eukaryota Chatton, 1925
     Kingdom Plantae Haeckel (1866) - plants
       Subkingdom Embryobionta Cronquist, Takht. & W.Zimm.
         Division Filicophyta see Phylum Pterophyta
           Subdivision Filicopsida Pfefferkorn (1976) see Class Filicopsida C.Agardh (1822)
             Order Filicales Dumort. (1829), nom. illeg. see Order Polypodiales Link (1833)
               Family Adiantaceae Newman (1840), nom. cons. - maidenhairs see Subfamily Adiantoideae Horvat (1927)
                 1 Genus Cheilanthes Sw. (1806), nom. cons.
                 2 Genus Pellaea Link (1841), nom. cons. - cliff brakes
                 3 Genus Notholaena R.Br.
                 4 Genus Pteris L. (1753)
                 5 Genus Adiantum L. (1753)
                 6 Genus Acrostichum L. (1753)
                 7 Genus Vittaria Sm. (1793)