Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       Astra Plinius - celestial bodies
         Universe
           (Supercluster) Virgo-Hydra-Centaurus Supercluster
             (Supercluster) Virgo Supercluster
               (Cluster) Local Group
                 (Galaxy) Milky Way Galaxy veter.
                   (Spiral arm) Orion Arm
                     (Region) Local Bubble
                       Local Interstellar Cloud
                         (Planetary system) Solar System
                           (Planet-satellite system) Earth System
                             (Planet) Earth veter.
                               "spheres" (Earth)
                                 (Sphere) Biosphere (Earth) - zone of life
                                   "terrestrial and freshwater ecoregions"
                                     (Biogeographic realm) Australasia
                                       (Ecoregion complex) Northern Australia and Trans-Fly Savannas
                                         1 (Terrestrial ecoregion) Trans Fly savanna and grasslands (Australasia)
                                         2.1 (Terrestrial ecoregion) Kimberly tropical savanna (Australasia)
                                         2.2 (Terrestrial ecoregion) Arnhem Land tropical savanna (Australasia)
                                         2.3 (Terrestrial ecoregion) Carpentaria tropical savanna (Australasia)
                                         2.4 (Terrestrial ecoregion) Cape York tropical savanna (Australasia)
                                         2.5 (Terrestrial ecoregion) Einasleigh upland savanna (Australasia)