William, I read that in our Dutch Urodela newsletter too. The ancestor of the both species used to live 14 mil. years ago. They look the same, so it's a cryptic species once again.
Berman, D.I, M.V. Derenko, B.A.Malyarchuk, T.Gryzbowski, A.P. Kryukov & D.Miscicka: Genetic Polymorphism in the Siberian newt (Salamandrella keyserlingii, Caudata, Amphibia) in its Range and the cryptic species of the newt S. schrencki from Primorie. - Sliwka in Doklady biological Science (403): 275/287.