Domain Eucaryota
   Subdomain Chlorota Doweld (2001)
     Kingdom Chlorobiota C.Jeffrey ex Doweld (2001) - plants see Subkingdom Viridiplantae Caval.-Sm. (1981)
       Subkingdom Pteridobiotina Britton & A. Br. (1896)
         Superphylum Pteridophytanae Doweld (2001)
           Phylum Ophioglossophyta Doweld (2001)
             A Subphylum Ophioglossophytina Doweld (2001) [monotypic]
             B Subphylum Psilotophytina Reveal (1996) [monotypic]