Recent molecular research has supported full species status for A. californiense, in contrast to its previous status as a subspecies of Ambystoma tigrinum (Shaffer and McKnight 1996). Full species status for A. californiense is also supported by its geographical isolation plus differences in coloration and natural history seen in A. californiense, as compared to other members of the A. tigrinum complex (Petranka 1998).
See another account at californiaherps.com
- Petranka, J. W. (1998). Salamanders of the United States and Canada. Smithsonian Institution Press, Washington and London.
- Fisher, R. N., and Shaffer, H. B. (1996). "The decline of amphibians in California's Great Central Valley." Conservation Biology, 10(5), 1387-1397.
- Shaffer, H. B., and McKnight, M. L. (1996). ''The polytypic species revisited: differentiation and molecular phylogenetics of the Tiger Salamander Ambystoma tigrinum (Amphibia: Caudata) complex.'' Evolution, 50, 417-433.