Phylum Bryophyta A.Braun (1864) - bryophytes
   Class Bryopsida McClatchie (1897) - mosses
     Subclass Bryidae Engl. (1892) - mosses
       Superorder Hypnanae W.R.Buck & Goffinet, 2000, nom. inval. see Superorder Hypnanae W.R.Buck & Goffinet ex W.R. Buck, C.J. Cox, A.J. Shaw & Goffinet (2005)
         Order Hypnales W.R. Buck & Vitt
           Family Helodiaceae Ochyra
             1 Genus Actinothuidium (Besch.) Broth. (1907)
             2 Genus Bryochenea C.H.Gao & K.C.Chang (1982)
             3 Genus Helodium Warnst. (1905), nom. cons.
             4 Genus Palustriella Ochyra