DinoFossilsUK A rare Tyrannosaurus Rex tooth with split carinae (the mesial carina splits into a fork). Split carinae are rare on Hell Creek Tyrannosaur teeth, roughly 4% have this trait, and of them some only have minor splits with a few serrations. This tooth has a nice, large fork-like split. The tooth also features some excellent enamel, is missing its tip and is quite robust (1 inch wide). Available now at dinofossils.co.uk! #dinofossilsuk #fossilforsale .