Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       Astra Plinius - celestial bodies
         Universe
           Virgo-Hydra-Centaurus Supercluster
             Virgo Supercluster
               Local Group
                 Milky Way Galaxy veter.
                   Orion Arm
                     Local Bubble
                       Local Interstellar Cloud
                         Solar System
                           Earth System
                             Earth veter.
                               "spheres" (Earth)
                                 Biosphere (Earth) - zone of life
                                   "marine ecoregions"
                                     Southern Ocean
                                       Continental High Antarctic
                                         1 East Antarctic Wilkes Land
                                         2 East Antarctic Enderby Land
                                         3 East Antarctic Dronning Maud Land
                                         4 Weddell Sea
                                         5 Amundsen/Bellingshausen Sea
                                         6 Ross Sea