Not to long ago I got a gorgosaur tooth as shown on my other post strange juvenile gorgosaurus tooth when I was studying it I did some research to make sure it’s a gorgosaur tooth I found out there are ways to indentify tyrannosaur teeth from Canada and Montana the main way is the cross section if the cross section is fat more like a circle it’s a despletosaurus if it’s more skinnier more oval shaped it’s a gorgosaur also another way is the size if it’s more then 3 inches it’s despletosaurus if it’s 3 inches or less it’s probably a gorgosaur or a small despletosaurus tooth the top tooth is a despletosaurus then the cross sections the first cross section is a despletosaurus see it looks more like a circle then the gorgosaur more of a oval then the gorgosaur tooth