Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Biota
           "neomura"
             Domain Eukaryota Chatton, 1925 - eukaryotes
               neokaryotes Cavalier-Smith 1993 - mitochondrial eukaryotes
                 neozoa Cavalier-Smith 1993
                   Superkingdom Corticata Lankester, 1878
                     Kingdom Plantae Haeckel (1866) - plants
                       [Division Spermatophyta Goebel (1882)] see Subphylum Spermatophytina (auct.) Cavalier-Smith (1998)
                         [Subdivision Gymnospermae] see Infraphylum Gymnospermae auct.
                           1 [Class †Pteridospermae] see Class Pteridospermopsida
                           1.0 [Class †Cycadofilices] see Class Pteridospermae
                           1.0 [Class †Lyginopteridatae] see Class Pteridospermae
                           2.0 [Class Cycadales] see Order Cycadales Pers. ex Bercht. & J. Presl (1820)
                           3 [Class †Bennettitatae]
                           3.0 [Class †Bennettitales]
                           4 [Class "Ginkgoata"] see Class Ginkgoatae
                           4.0 [Class Ginkgoales]
                           5 [Class †Cordaitopsida] see Order Cordaitanthales
                           5.0 [Class †Cordaitales]
                           5.0 [Class †Cordaitatae]
                           5.0 [Class †Cordaitinae]
                           6 [Class Coniferopsida] see Class Pinopsida Burnett (1835)
                           6.0 [Class Coniferinae]
                           7 [Class Taxopsida Lotsy (1909)]
                           8 [Class Gnetatae]
                           8.0 [Class Gnetales]