I was taught that the Woods Bison never really existed. That the legends surounding it's existance were never based on an actual wild population.
Well, since there aren't any eastern Bison left around to stufy, I guess its a mute point.
Its ahrd to believe that a bison population adapted ot living in the eastern part of the U.S. didn't exhibit at least subspecific differences from the plains animal - that's a pretty big range for the same species.
The eastern wolf and cougar are recognized as different subspecies from the western animal I believe.