Domain Eucaryota
   Subdomain Chlorota Doweld (2001)
     Kingdom Chlorobiota C.Jeffrey ex Doweld (2001) - plants see Subkingdom Viridiplantae Caval.-Sm. (1981)
       Subkingdom Bryobiotina Campb. (1890)
         Phylum †Langiophytophyta Doweld (2001) [monotypic]
           Class †Langiophytopsida Doweld (2001)
             Order †Lyonophytales Doweld (2001) [monotypic]
               Family †Lyonophytaceae Doweld (2001) [monotypic]
                 1 Genus †Lyonophyton W.Remy & R.Remy (1980)