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I added this Timurlengia euotoca tooth to my collection.  The question I have is this a Tyrannosaur or Tyrannosaurid tooth.  I ask that because the serrations are very fine and it's compressed unlike any other Tyrannosaurids  I've seen in North America.




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Most sellers and collectors call this a tyrannosaur or tyrannosaurid tooth.  The reality is its not a Tyrannosaurid, that includes T-rex, Albertosaurus, Gorgosaurus, Daspletosaurus etc.  Probably why its teeth are very different.   Its placements is uncertain and currently under the superfamily Tyrannosauroidea.  Its a small to mid theropod with a long snout that may eventually be a sister family to Tyrannosaurids but that for paleontologists to determine with new discoveries.   Dont get hung up with placements its normal for species to be reassigned with new discoveries 





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You have a tyrannosaur tooth, which is a short-form/informal for Tyrannosauroidea, the broad superfamily of T. rex, Dilong, Alectrosaurus and other related dinosaurs. But it's not a tyrannosaurid which specifically refers to Tyrannosauridae such as T. rex, Nanotyrannus, Daspletosaurus and other closely-related dinosaurs.


This would be a better read:


Tyrannosaur = Tyrannosauroidea > https://en.wikipedia.org/wiki/Tyrannosauroidea
Tyrannosaurid = Tyrannosauridae > https://en.wikipedia.org/wiki/Tyrannosauridae

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