organisms see Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
   Domain Eukaryota Chatton, 1925 - eukaryotes
     Kingdom Plantae Haeckel (1866) - plants
       Subkingdom Viridaeplantae Cavalier-Sm. (1981) - green plants see [unranked] Viridiplantae Cavalier-Smith, 1981
         Land plants
           Phylum Pteridophyta Schimp. (1879) see Phylum Filicinophyta
             leptosporangiates - leptosporangiate ferns
               Order Filicales Dumort. (1829), nom. illeg. see Order Polypodiales Link (1833)
                 01 Family †Botryopteridaceae Renault ex D.H.Scott (1900), nom. illeg. see Family Botryopteridiaceae Doweld (2001)
                 02 Family †Anachoropteridaceae P. Bertrand see Family Psalixochlaenaceae Holmes (1981)
                 03 Family †Kaplanopteridaceae A.M.F. Tomescu, G.W.Rothwell & M.L. Trivett (2006)
                 04 Family †Psalixochlaenaceae Holmes (1981)
                 05 Family †Sermayaceae Eggert & Delevoryas (1967), nom. cons. prop.
                 06 Family †Tedeleaceae D.A.Eggert & T.N.Taylor
                 07 Family †Skaaripteridaceae Galtier & T.N.Taylor (1994)
                 08 Family †Tempskyaceae C.B.Read & R.W.Br. ex C.F.Reed (1948)
                 09 Family Schizaeaceae Kaulf. (1827)
                 10 Family Hymenophyllaceae Mart. (1835) - filmy ferns
                 11 Family Gleicheniaceae C.Presl (1825) - forking ferns
                 12 Family Dicksoniaceae M.R.Schomb. (1848), nom. cons. - dicksonioids
                 13 Family Cyatheaceae Kaulf. (1827) - scaly tree ferns
                 14 Family Matoniaceae C.Presl (1847) - matonioids
                 15 Family Loxsomataceae C.Presl (1847)
                 16 Family Dipteridaceae Seward & E.Dale (1901)