Kingdom Chlorobiota C.Jeffrey ex Doweld (2001) - plants see Subkingdom Viridiplantae Caval.-Sm. (1981)
   Subkingdom Bryobiotina Campb. (1890)
     Division Bryophyta A.Braun (1864) - mosses and liverworts see Phylum Bryophyta A.Braun (1864)
       Subdivision Bryophytina Engl. (1892) see Subphylum Bryophytina Engl. (1892)
         Class Polytrichopsida Doweld (2001) [monotypic]
           Order Polytrichales M. Fleisch. [monotypic]
             Family Polytrichaceae Schwägr.
               01 Genus Alophozia Cardot ex Sérgio (1984), orth. inval. see Genus Alophosia Cardot (1905)
               02 Genus Atrichopsis Cardot (1912)
               03 Genus Atrichum P.Beauv. (1804), nom. cons.
               04 Genus Bartramiopsis Kindb. (1894)
               05 Genus Dawsonia R.Br. (1811)
               06 Genus Dendroligotrichum (Müll.Hal.) Broth. (1905)
               07 Genus Hebantia G.L.Merr. (1996)
               08 Genus Itatiella G.L. Sm. (1971)
               09 Genus Lyellia R.Br. (1819)
               10 Genus Meiotrichum (G.L. Sm.) G.L.Merr.
               11 Genus Notoligotrichum G.L. Sm. (1971)
               12 Genus Oligotrichum DC. (1805), nom. cons.
               13 Genus Plagioracelopus G.L.Merr. (1987)
               14 Genus Pogonatum P.Beauv. (1804)
               15 Genus Polytrichadelphus (Müll.Hal.) Mitt. (1859)
               16 Genus Polytrichastrum G.L. Sm. (1971)
               17 Genus Polytrichum Hedw. (1801)
               18 Genus Pseudatrichum Reimers (1941)
               19 Genus Psilopilum Brid. (1827)
               20 Genus Steereobryon G.L. Sm. (1971)