Crotalus enyo COPE 1861
| Contributions to the ophiology of Lower California, Mexico and Central America E D Cope (1861) Proc. Acad. Nat. Sci. Philadelphia 13: 292-306 | |
| Crotalus tigris and Crotalus enyo, two little known rattlesnakes of the southwest Laurence M Klauber (1931) Transactions of the San Diego Society of Natural History 6: 353-370 | |
| Type specimens of reptiles and amphibians in the United States National Museum (1961) Bulletin of the United States National Museum 220: 1-291 |