Phylum Bryophyta A.Braun (1864) - bryophytes
   Class Bryopsida McClatchie (1897) - mosses
     Subclass Bryidae Engl. (1892) - mosses
       Superorder Bryanae Goffinet & W.R. Buck
         Order Bryales Limpr.
           Family Mniaceae Schwägr.
             Genus Pseudobryum (Kindb.) T.J.Kop. (1968)