Kingdom Chlorobiota C.Jeffrey ex Doweld (2001) - plants see Subkingdom Viridiplantae Caval.-Sm. (1981) Subkingdom Pteridobiotina Britton & A. Br. (1896) Superdivision Pteridophytanae Doweld (2001) [monotypic] see Superphylum Pteridophytanae Doweld (2001) Division Monilophyta Cantino & Donoghue Class Psilotopsida D.H.Scott (1909) see Subclass Ophioglossidae Klinge (1882) a Order Ophioglossales Link (1833) [monotypic] b Order Psilotales Prantl (1884) [monotypic]