Started with a fox, used only foxes ... soooo .......
...it evolved into a human???
Technically, what is supposed to determine if a creature is a seperate species is it's ability to breed with the other or not.
While some, such as horses and donkeys can breed successfully, their offspring.. mules, are unable to bear offspring, thus the donkey and horse are seperate species.
Canines able to interbreed among breeds, poodles to beagles, rotts to pits, and their offspring are fertile too, thus are same species.
This may be a new BREED of fox, but I am uncertain about species. Can these breed fertile offspring with a wild fox or not? If so, they are not a new species.