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dinosaur man

Strange juvenile gorgosaurus tooth

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dinosaur man

On my birthday I got a juvenile gorgosaur tooth didn’t look special other then the colour but then I started to check it out and study it and instead of serrations there were small holes so I came up with a theory how juvenile tyrannosaurs didn’t have serrations until they got older yet I still need more proof to back up my theory but I found it interesting it was collected on a ranch in the Judith River formation not to far from the Canadian border it is 75 million years old here are some photos of it.

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Edited by dinosaur man

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Troodon

The serrations are missing because the tooth is simply very worn.. Serrations are present in very small Tyrannosaurid teeth.   Where was this tooth found?   Tyrannosaurid teeth from the Judith River  Formation of Montana cannot be distinguished between one another.  They can be either Daspletosaurus or Gorgosaurus 

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dinosaur man

I can tell it’s a gorgosaur because the cross section the tooth is also 2 cm 

Edited by dinosaur man

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Troodon

The shape of the cross-section of the tooth at the base is more a function of the tooth position in the jaw and not an indicator of species.   Juvenile campanian tyrannosaurid teeth cannot be distinguished between one another.  A paper that explored the difference between small Albertosaurus, Daspletosaurus and Gorgosaurus came to this conclusion :

 

"In summary, although the teeth of tyrannosaurid dinosaurs must belong to one of five types based on position of teeth in the bones of the jaws, it is difficult to quantifiably distinguish these teeth reliably by taxon. 

 

https://www.researchgate.net/publication/261630184_Morphometry_of_the_teeth_of_western_North_American_tyrannosaurids_and_its_applicability_to_quantitative_classification

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dinosaur man

What type of tyrannosaur tooth is this it’s 75 million years old and is from the Judith River formation it’s from a juvenile and is 2cm?

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A3E26D83-DB8F-4577-9A69-8CA66223CEB6.jpeg

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JohnBrian

Troodon's guide should still work for Judith.

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fossilsonwheels

You will probably find it is Tyrannosaur indet. You can not distinguish the small Tyrannosaur teeth from Judith River or at least that is what I understand.

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dinosaur man

Ok

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-Andy-

If it's from JRF then you could label it as 'Daspletosaurus/Gorgosaurus sp.'

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Troodon

Why is this being reposted the answer does not change

You say its from the JRF but is it not a Canadian tooth or one from Montana?

 

 

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Fossildude19

Topic moved to Fossil ID, and merged with previous post. 
@dinosaur man

Please do not post the same fossil multiple times. 

You have already received the best answer possible. 

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dinosaur man

I have one more it’s from North Shore Drive Lowbanks Dunnville Ontario it’s from the Devonian period sorry it’s not sharp thats the best I could takeD0E1780B-6410-4F79-9105-2710668506EB.thumb.jpeg.3e3c1a1c908a978af1ae8483a144385b.jpeg

495D042A-944A-4F6E-AF84-AFA6343D171C.jpeg

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dinosaur man

troodon i think its from canada or the more northen parts of montana but prety sure southern alberta

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dinosaur man

a little bit of the Judith river formation is in Canada not much if you were to drive it it would only be about 15 minutes till the Judith river formation ends

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Troodon

Just for your info here are the formation designation in Alberta.   Judith River Fm is now only used for Montana and Belly River Group for Canada and comprises the Oldman, Dinosaur Park and Foremost Fm

Screenshot_20190406-191847.thumb.jpg.107054fdfd54125ded0c6a0c1336d7fc.jpg

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dinosaur man

Then it’s from Canada 

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