DatFossilBoy Posted December 7, 2019 Share Posted December 7, 2019 Hello all! I have acquired a very nice juvenile tyrannosaurid tooth from the Judith River Formation. I am fully aware that teeth from there are very difficult to be assigned a specie, but I was wondering if it could be narrowed down a little. Last time @Troodon was able to give me awesome info and help. The tooth is a premax tooth and is 1,7cm in length. I have a serration count for both distal and mesial sides: hard to tell for sure but it looks like 3/mm for the distal 4/mm for the mesial Thank you very much for all imput and info Kind regards, Thomas Link to comment Share on other sites More sharing options...
DatFossilBoy Posted December 7, 2019 Author Share Posted December 7, 2019 Link to comment Share on other sites More sharing options...
Troodon Posted December 7, 2019 Share Posted December 7, 2019 Where was this tooth found, state and county needed. Photo of base please and mesial side. Dont see a premaxillary tooth Link to comment Share on other sites More sharing options...
jpc Posted December 8, 2019 Share Posted December 8, 2019 I don't see a premax tooth either. He did sat Judith River Fm. That is fairly limited geographically. Northern MT and southern ALB. Link to comment Share on other sites More sharing options...
Troodon Posted December 8, 2019 Share Posted December 8, 2019 9 hours ago, jpc said: He did sat Judith River Fm Yep but unfortunately I dont trust this without a specific locality, county & state. Have seen too many issues. Preservation looks spot on. Link to comment Share on other sites More sharing options...
DatFossilBoy Posted December 8, 2019 Author Share Posted December 8, 2019 21 hours ago, Troodon said: Where was this tooth found, state and county needed. Photo of base please and mesial side. Dont see a premaxillary tooth I’m waiting for the seller’s answer regarding location. Here are pictures from the base and mesial sides. What position in the jaw did this tooth have? Thanks a lot for the help. Kind regards. Link to comment Share on other sites More sharing options...
DatFossilBoy Posted December 8, 2019 Author Share Posted December 8, 2019 Link to comment Share on other sites More sharing options...
Troodon Posted December 8, 2019 Share Posted December 8, 2019 Well if it's a Tyrannosaurid it's a dentary tooth. Unfortunately there are no characteristics to determine which one. BUT not sure it's one could be Dromaeosaurus. Not sure will to look at some of my teeth to compare against 1 Link to comment Share on other sites More sharing options...
DatFossilBoy Posted December 8, 2019 Author Share Posted December 8, 2019 11 minutes ago, Troodon said: Well if it's a Tyrannosaurid it's a dentary tooth. Unfortunately there are no characteristics to determine which one. BUT not sure it's one could be Dromaeosaurus. Not sure will to look at some of my teeth to compare against Interesting. Thank you! Link to comment Share on other sites More sharing options...
Troodon Posted December 8, 2019 Share Posted December 8, 2019 The teeth can be very similar but the serration count matched larger Tyrannosaurid teeth I have just as robust. Looks like an anterior dentary tooth. 1 Link to comment Share on other sites More sharing options...
DatFossilBoy Posted December 8, 2019 Author Share Posted December 8, 2019 1 hour ago, Troodon said: The teeth can be very similar but the serration count matched larger Tyrannosaurid teeth I have just as robust. Looks like an anterior dentary tooth. Thank you very much for that info. It’s from Montana and the county is Hill Link to comment Share on other sites More sharing options...
Troodon Posted December 8, 2019 Share Posted December 8, 2019 Thank you that's JRF 1 Link to comment Share on other sites More sharing options...
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