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 †Botryopteridiophyta Doweld (2001) see Division Monilophyta Cantino & Donoghue Class †Botryopteridiopsida Doweld (2001) see Class Marattiopsida Doweld (2001) Order †Zygopteridales Emberger (1944) 1 Family †Zygopteridaceae P.Bertrand ex D.H.Scott (1912) 2 Family †Corynepteridaceae Cleal (1993) see Family Zygopteridaceae P.Bertrand ex D.H.Scott (1912) 3 Family †Biscalithecaceae Cleal (1993) see Family Zygopteridaceae P.Bertrand ex D.H.Scott (1912)