| Europe | Level 1 (Parent) |
|          Scandinavia-European Arctic | Level 2 (Sibling) |
|          Northwest Europe | Level 2 (Sibling) |
|          Iberian Peninsula | Level 2 (Sibling) |
|          Alps | Level 2 (Sibling) |
|          Italian Peninsula and Islands | Level 2 (Sibling) |
|          Eastern Europe Ranges | Level 2 (Sibling) |
|          Balkan Peninsula | Level 2 (Sibling) |
|          Ural Mountains | Level 2 |
|                  Arctic Urals | Level 3 (Child) |
|                  Prepolar Urals | Level 3 (Child) |
|                  Northern Urals | Level 3 (Child) |
|                  Central Urals | Level 3 (Child) |
|                  Southern Urals | Level 3 (Child) |
|                  North Caspian Sea Area | Level 3 (Child) |
|          Caucasus Mountains | Level 2 (Sibling) |