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) Subphylum Psilotophytina Reveal (1996) [monotypic] 1 Class Psilotopsida D.H.Scott (1909) [monotypic] see Subclass Ophioglossidae Klinge (1882)