-Andy- Posted October 14, 2021 Share Posted October 14, 2021 (edited) Hello, this tooth has baffled me for years. I can't tell if it is a juvenile tyrannosaurid dentary tooth or a cf. Richardoestesia gilmorei tooth Its locality info is Montana, Two Medicine Formation The tooth has a serration density of 19/5mm on the distal mid-line. Unfortunately the mesial carina is worn down so that crucial data is missing The CH is 11.5 mm, CBW is 7 mm and CBL is 4.5 mm As far as I am aware, juvenile tyrannosaurid (with the exception of T. rex) have slender teeth while as this tooth is somewhat robust. Meanwhile, Richardoestesia gilmorei is somewhat of a wastebasket ID for many teeth(likely unrelated species), so this teeth should fall into the range of size and morphology for one May I have your thoughts on this tooth? Edited October 14, 2021 by -Andy- 1 Looking forward to meeting my fellow Singaporean collectors! Do PM me if you are a Singaporean, or an overseas fossil-collector coming here for a holiday! Link to comment Share on other sites More sharing options...
Troodon Posted October 14, 2021 Share Posted October 14, 2021 Hi Andy I'm inclined to call this a dentary tooth of a juvie Tyrannosaurid. If I look at what Currie describes in Dinosaur Systematics, R. gilmorei teeth have minute denticles in the order of 6/mm and most important are very compressed. Both these characteristics do not match your tooth. It also looks too robust to be one. 3 Link to comment Share on other sites More sharing options...
-Andy- Posted October 15, 2021 Author Share Posted October 15, 2021 9 hours ago, Troodon said: Hi Andy I'm inclined to call this a dentary tooth of a juvie Tyrannosaurid. If I look at what Currie describes in Dinosaur Systematics, R. gilmorei teeth have minute denticles in the order of 6/mm and most important are very compressed. Both these characteristics do not match your tooth. It also looks too robust to be one. Thank you. Henry Mendoza agrees. He said it's a juvenile posterior tyrannosaur tooth. Looking forward to meeting my fellow Singaporean collectors! Do PM me if you are a Singaporean, or an overseas fossil-collector coming here for a holiday! Link to comment Share on other sites More sharing options...
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