Thats interesting, These are the only articles I could find. They were on CNAH. Im not sure why it is that way on Amphibiaweb though I would like to know also.
>Collins, Joseph T. (1991 Viewpoint: A new taxonomic arrangement for some North American amphibians and reptiles. Herpetological Review. 22(2): pp. 42-43), using the Evolutionary Species Concept, considered this previously defined and diagnosed allopatric taxon a distinct species, a more conservative arrangement than recognizing it as a race of Taricha torosa with which it does not intergrade nor exchange genes.
>Kuchta, S. R. and A. M. Tan (2006 Lineage diversification on an evolving landscape: phylogeography of the California Newt, Taricha torosa (Caudata: Salamandridae) . Biological Journal of the Linnaean Society. 89: pp. 213-239), using mtDNA, demonstrated that this race is a distinct species, but withheld formal recognition of this status pending additional study.