| North Sonoran Desert Ranges | Level 4 (Parent) |
|          Kofa Area | Level 5 (Sibling) |
|          Harquahala Area | Level 5 (Sibling) |
|          Cabeza Prieta Area | Level 5 (Sibling) |
|          Organ Pipe Area | Level 5 (Sibling) |
|          Maricopa Area | Level 5 (Sibling) |
|          South Phoenix Area | Level 5 |
|                  South Mountains | Level 6 (Child) |
|                  Santan Mountains | Level 6 (Child) |
|                  Sacaton Mountains | Level 6 (Child) |
|                  Usery Mountains | Level 6 (Child) |
|                  Goldfield Mountains | Level 6 (Child) |
|          Baboquivari Area | Level 5 (Sibling) |
|          La Lesna Area | Level 5 (Sibling) |
|          San Luis Area | Level 5 (Sibling) |
|          West Tucson-Nogales Area | Level 5 (Sibling) |