I have heard the name "Fire Salamander" used to describe quite a few species through out Appalachia. (Thank my hillbilly roots
).
My mother's family uses this name to describe both Notos in the "eft" stage, and various Ambystomid salamanders. I have also personally seen various Plethos and Desmos referred to as Fire Salamanders. My father's family even demonstrated to me as a child the easiest way to find salamanders was when building a campfire!
I feel this is another example of the confusion caused by common names and regional usage of them.
Remember that a good portion of the population of that area of the US is descended from an interesting mix of Slavic, Germanic, and Scots-Irish ancestry. I suspect the whole bit about salamanders living in fire got carried over with them and continued on in reference to the local critters. My father's family even demonstrated to me the easiest way to find salamanders was when building a campfire!
In fact, this is one of the critters my mountain folk most often called a fire salamander!