Aublysodon? Tyrannosaur premaxillery tooth, Hell creek (Montana)

Aublysodon was once suspected to be a species of tyrannosaur known as the last of the tyrannosaurs, still in dispute and without further specimens to verify, the latest opinion is that these teeth which are commonly found at the Hell creek formation site are most probably the premaxillary teeth of either Tyrannosaurus rex or the Nanno-Tyrannus. Due to the size of this tooth I would most likely assign this to the latter species. From the upper Cretaceous, Campanian stage puts this superb tooth at approx 70 million years old. Found at hell creek formation, Montana, USA.