Phylum [Tracheophyta] Sinnott ex Caval.-Sm. (1998) - vascular plants Subphylum Polypodiophytina Reveal (1996) [monotypic] Class Polypodiopsida Cronquist, Takht. & Zimmerm. (1966) - ferns Subclass Polypodiidae Cronquist, Takht. & Zimmerm. (1966) Order Polypodiales Link (1833) - cathetogyrates Suborder Lindsaeineae 27 Family Cystodiaceae J.R.Croft [monotypic] 28 Family Lonchitidaceae C.Presl ex M.R.Schomb. [monotypic] 29 Family Lindsaeaceae C.Presl ex M.R.Schomb. (1848) - lindsaeoids