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
                                   "marine ecoregions"
                                     (Biogeographic realm) Southern Ocean
                                       (Biogeographic province) Subantarctic Islands
                                         1 (Marine ecoregion) Macquarie Island
                                         2 (Marine ecoregion) Heard and Macdonald Islands
                                         3 (Marine ecoregion) Kerguelen Islands
                                         4 (Marine ecoregion) Crozet Islands
                                         5 (Marine ecoregion) Prince Edward Islands
                                         6 (Marine ecoregion) Bouvet Island
                                         7 (Marine ecoregion) Peter the First Island