Kingdom Chlorobiota C.Jeffrey ex Doweld (2001) - plants see Subkingdom Viridiplantae Caval.-Sm. (1981)
   Subkingdom Pteridobiotina Britton & A. Br. (1896)
     Superdivision Cycadophytanae Doweld (2001) see Superphylum Cycadophytanae Doweld (2001)
       Division †Progymnospermophyta Bold et al. see Phylum Progymnospermophyta Lang (1925)
         Class †Noeggerathiopsida Krysht. (1934)
           Order †Discinitales Doweld (2001) [monotypic]
             1 Family †Discinitaceae Gao Zhifeng & B.A.Thomas (1994), nom. cons. prop.