Schemes including Gopherus polyphemus

• IUCN Red List of Threatened Species. Version 2012.1 Gopherus polyphemus
• The Reptile Database (Gopherus_polyphemus) Gopherus polyphemus
• IUCN Red List of Threatened Species. Version 2012.2 (9403) Gopherus polyphemus
• NatureServe Explorer: An online encyclopedia of life. Version 7.1 (ELEMENT_GLOBAL.2.105196) Gopherus polyphemus
• GBIF (2441812) Gopherus polyphemus