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 |
                 Sierra Estrella | Level 6 (Child) |
                 Maricopa Mountains | Level 6 (Child) |
                 Sand Tank Mountains | Level 6 (Child) |
                 Table Top Mountains | Level 6 (Child) |
                 Vekol Mountains | Level 6 (Child) |
                 Castle Mountains | Level 6 (Child) |
                 Sheridan Mountains | Level 6 (Child) |
                 Sierra Blanca Mountains | Level 6 (Child) |
                 Brownell Mountains | Level 6 (Child) |
                 Quijotoa Mountains | Level 6 (Child) |
         South Phoenix Area | Level 5 (Sibling) |
         Baboquivari Area | Level 5 (Sibling) |
         La Lesna Area | Level 5 (Sibling) |
         San Luis Area | Level 5 (Sibling) |
         West Tucson-Nogales Area | Level 5 (Sibling) |