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 Grimmiales M. Fleisch.
               Family Ptychomitriaceae Schimp.
                 1 Genus Aligrimmia R.S.Williams (1903)
                 2 Genus Campylostelium Bruch & Schimp. (1846)
                 3 Genus Indusiella Broth. & Müll.Hal. (1898)
                 4 Genus Jaffueliobryum Thér. (1928)
                 5 Genus Ptychomitriopsis Dixon (1931)
                 6 Genus Ptychomitrium Fürnr. (1829), nom. cons., orth. cons.