Rana amurensis (Khabarovsk frog, Siberian wood frog, Heilongjiang brown frog or Amur brown frog) is a species of true frog found in northern Asia. It ranges across western Siberia, as well as northeastern China, northeastern Mongolia, and on the northern Korean Peninsula and on Sakhalin. "Rana coreana" was previously included in this species as a subspecies.

Can we draw the following conclusion?
Rana coreana were developed from Rana amurensis.
It's impossible to say