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 †Psilophytanae Doweld (2001) I Phylum †Rhyniophyta Cronquist, Takht. & Zimmerm. (1966) [monotypic] II Phylum †Psilophytophyta Zimmerm. (1930) [monotypic]