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"
                                     (Bioregion) Old World
                                       (Biogeographic realm) Palearctic
                                         (Ecoregion complex) Caucasus-Anatolian-Hyrcanian Temperate Forests (Palearctic)
                                           1 (Terrestrial ecoregion) Euxine-Colchic deciduous forests (Palearctic)
                                           2 (Terrestrial ecoregion) Northern Anatolian conifer and deciduous forests (Palearctic)
                                           3 (Terrestrial ecoregion) Caucasus mixed forests (Palearctic)
                                           4 (Terrestrial ecoregion) Caspian Hyrcanian mixed forests (Palearctic)
                                           5 (Terrestrial ecoregion) Elburz Range forest steppe (Palearctic)
                                           6 (Terrestrial ecoregion) Kopet Dag woodlands and forest steppe (Palearctic)