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 Gleicheniopsida Doweld (2001) see Order Gleicheniales Link (1833)
               Order †Oligocarpiales Doweld (2001) [monotypic] see Order Gleicheniales Link (1833)
                 Family †Oligocarpiaceae Doweld (2001) [monotypic] see Family Gleicheniaceae C.Presl (1825)
                   Genus †Oligocarpia Göpp. (1841)