Subclass [Bryidae] Engl. (1892) - mosses
   Superorder Ptychomnianae W.R.Buck et al. (2004) see Superorder Hypnanae W.R.Buck & Goffinet ex W.R. Buck, C.J. Cox, A.J. Shaw & Goffinet (2005)
     Order Ptychomniales W.R. Buck, C.J. Cox, A.J. Shaw & Goffinet (2005)
       1 Family Ptychomniaceae M. Fleisch. (1908)