Kennicott, R. 1859. Reptiles of the Boundary, Vol. 2, pt. 2., United States and Mexican Boundary Survey. U.S. 34th Congress, 1st Session, Executive Document (108). 14, plate 6.
Place:
Sierra Verde Y Pozo Verde, Pima, Arizona, United States, North America
Taxonomy:
Animalia Chordata Reptilia Squamata Viperidae Crotalinae