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)
               01 Family Osmundaceae Martinov (1820)
               02 Family Plagiogyriaceae Bower (1926)
               03 Family Schizaeaceae Kaulf. (1827)
               04 Family Parkeriaceae Hook. (1825) see Subfamily Parkerioideae Burnett (1835)
               05 Family Platyzomataceae Nakai (1950) see Subfamily Platyzomatoideae (Nakai) A.F.Tryon
               06 Family Adiantaceae Newman (1840), nom. cons. - maidenhairs see Subfamily Adiantoideae Horvat (1927)
               07 Family Loxsomataceae C.Presl (1847)
               08 Family Hymenophyllaceae Mart. (1835) - filmy ferns
               09 Family Stromatopteridaceae D.W. Bierhorst (1968) see Subfamily Stromatopteridoideae Nakai (1950)
               10 Family Gleicheniaceae C.Presl (1825) - forking ferns
               11 Family Matoniaceae C.Presl (1847) - matonioids
               12 Family Cheiropleuriaceae Nakai (1928) see Family Dipteridaceae Seward & E.Dale (1901)
               13 Family Dipteridaceae Seward & E.Dale (1901)
               14 Family Polypodiaceae J.Presl & C.Presl (1822) - polygrams
               15 Family Grammitidaceae Newman (1840) - grammitids see Family Polypodiaceae J.Presl & C.Presl (1822)
               16 Family Metaxyaceae Pic.Serm. (1970)
               17 Family Lophosoriaceae Pic.Serm. (1970) see Family Dicksoniaceae M.R.Schomb. (1848), nom. cons.
               18 Family Dicksoniaceae M.R.Schomb. (1848), nom. cons. - dicksonioids
               19 Family Cyatheaceae Kaulf. (1827) - scaly tree ferns
               20 Family Dennstaedtiaceae Lotsy (1909) - dennstaedtioids
               21 Family Aspleniaceae Newman (1840) - spleenworts
               22 Family Davalliaceae M.R. Schomb. (1848) - davallioids
               23 Family Blechnaceae Newman (1844) - blechnoids