Phylum Bryophyta A.Braun (1864) - bryophytes
   Class Bryopsida McClatchie (1897) - mosses
     Subclass Bryidae Engl. (1892) - mosses
       Superorder Rhizogonianae see Superorder Bryanae Goffinet & W.R. Buck
         Order Rhizogoniales Goffinet & W.R. Buck
           Family Pterobryellaceae (Broth.) W.R.Buck & Vitt
             1 Genus Pterobryella (Müll.Hal.) A. Jaeger (1877)