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 Family Lindsaeaceae C.Presl ex M.R.Schomb. (1848) - lindsaeoids Genus Osmolindsaea (K.U.Kramer) Lehtonen & Christenh. (2010)