An article in the Sonoran Herpetologist describes DNA studies that show that this population appears to have developed from at least two lineages that are sometimes considered different Ctenosaura species and sometimes considered different Ctenosaura hemilopha subspecies. I will just list them as Ctenosaura hemilopha for simplicity.
- Brennan, T. C. and Holycross, A. T. 2006. A Field Guide to Amphibians and Reptiles in Arizona
- Smith, H. M. 1995. Handbook of Lizards: Lizards of the United States and Canada
- Smith, H. M., Brodie, E. D. Jr. 1982. Reptiles of North America: A Guide to Field Identification
- Stebbins, R. C. 2003. Peterson Field Guide to Western Reptiles and Amphibians, Third Edition