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 Pteridophyta Schimp. (1879) see Phylum Filicinophyta Class Pteridopsida Ritgen (1828) see Order Polypodiales Link (1833) Subclass Polypodiidae Cronquist, Takht. & Zimmerm. (1966) Order Polypodiales Link (1833) - cathetogyrates 1 Family Loxogrammaceae Ching ex Pic.Serm. (1975) see Tribe Loxogrammeae R.M. Tryon & A.F. Tryon (1982) 2 Family Polypodiaceae J.Presl & C.Presl (1822) - polygrams 3 Family Grammitaceae Newman (1840) see Family Grammitidaceae Newman (1840)