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 Polypodiopsida Cronquist, Takht. & Zimmerm. (1966) - ferns
           Order Cyatheales A.B.Frank (1877) - tree ferns
             Family Cyatheaceae Kaulf. (1827) - scaly tree ferns
               1 Genus Alsophila R.Br.
               2 Genus †Alsophilocaulis C.A.Menéndez (1961)
               3 Genus †Cibotiocaulis Ogura (1927)
               4 Genus Cnemidaria C.Presl see Genus Cyathea Sm. (1793)
               5 Genus Cyathea Sm. (1793)
               6 Genus Gymnosphaera Blume (1828) see Genus Alsophila R.Br.
               7 Genus †Oguracaulis W.D. Tidwell, H.Nishida & N.Webster (1989)
               8 Genus Sphaeropteris Bernh.