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 Bryopsida McClatchie (1897) - mosses
           Subclass Dicranidae Doweld (2001)
             Order Scouleriales Goffinet & W.R.Buck (2004)
               Family Drummondiaceae Goffinet (2000) [monotypic]
                 1 Genus Drummondia Hook. (1828), nom. cons.