Phylum Bryophyta A.Braun (1864) - bryophytes
   Class Bryopsida McClatchie (1897) - mosses
     Subclass Dicranidae Doweld (2001)
       Order Grimmiales M. Fleisch.
         Family Drummondiaceae Goffinet (2000)
           Genus Drummondia Hook. (1828), nom. cons.