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) Hydrosphere (Earth) - layer of water
                                   (Drainage basin) Indian Ocean Basin
                                     (Drainage basin) De Grey River Basin (Australia: Western Australia)
                                       (Drainage basin) Nullagine River Basin (Australia: Western Australia)
                                         01 (Stream) Nullagine River (Australia: Western Australia)
                                         02 (Stream) Five Mile Creek (Australia: Western Australia)
                                         03 (Stream) Coonanbunna Creek (Australia: Western Australia)
                                         04 (Stream) Walgunya Creek (Australia: Western Australia)
                                         05 (Stream) Stony Creek (Australia: Western Australia)
                                         06 (Stream) Police Creek (Australia: Western Australia)
                                         07 (Stream) Elsie Creek (Australia: Western Australia)
                                         08 (Stream) Cookes Creek (Australia: Western Australia)
                                         09 (Stream) Reedy Creek (Australia: Western Australia)
                                         10 (Stream) Bridget Creek (Australia: Western Australia)
                                         11 (Stream) Twenty Mile Creek (Australia: Western Australia)
                                         12 (Stream) McPhee Creek (Australia: Western Australia)
                                         13 (Stream) Taylor Creek (Australia: Western Australia)
                                         14.1 (Stream) Five Mile Creek (Australia: Western Australia)
                                         14.2 (Stream) Castle Creek (Australia: Western Australia)
                                         15 (Stream) Cajuput Creek (Australia: Western Australia)
                                         16 (Stream) Beaton Creek (Australia: Western Australia)
                                         17 (Stream) Bonnie Creek (Australia: Western Australia)
                                         18 (Stream) Daylight Creek (Australia: Western Australia)
                                         19 (Stream) Wild Dog Creek (Australia: Western Australia)