A large, partial Nanotyrannus tooth from the Hell Creek Formation. While this tooth is missing its tip, this is a particularly chunky Nanotyrannys tooth with some great enamel and serrations (a chunky tooth like this would normally be assigned to Tyrannosaurus rex, but the pinched sides near the base are characteristic of Nanotyrannus). Comes labelled and stored in an acrylic case with padding.
65 million years (Cretaceous)
Powder River County, Montana, Hell Creek Formation