Omnomosaurus Posted April 30, 2016 Share Posted April 30, 2016 (edited) Hi all! New(and hopefully frequent) user here. I was hoping someone could provide a definitive ID for this tooth. I've had it in my possession for a couple of years, after spotting it amongst a jumble of shark teeth, and can't for the life of me decide whether to outright call this a croc tooth or not? The only info that came with it was the locality - Hell Creek. It has quite large serrations down one side (counted 11 per cm), with a heavily worn tip & large damage to one side. The top-down/bottom-up shape is quite rounded, but not completely circular (you can see for yourselves in the third & fourth pics. Any help much appreciated! Edited April 30, 2016 by Omnomosaurus Link to comment Share on other sites More sharing options...
Auspex Posted April 30, 2016 Share Posted April 30, 2016 What I at first took to be a serrated carina appears to be a groove instead of a ridge; Is this so, or is it an illusion in the image? "There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant “Try to learn something about everything and everything about something.” - Thomas Henry Huxley >Paleontology is an evolving science. >May your wonders never cease! Link to comment Share on other sites More sharing options...
fifbrindacier Posted April 30, 2016 Share Posted April 30, 2016 (edited) What I at first took to be a serrated carina appears to be a groove instead of a ridge; ~.jpg Is this so, or is it an illusion in the image? Hello Auspex, i tried to find out a translation of what carina means but i didn't, could you please tell me what it is ? I also see serrations, i also thought it was a ridge but i am stumped, maybe this is a groove. Edited April 30, 2016 by fifbrindacier "On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry) "We only well see with the heart, the essential is invisible for the eyes." In memory of Doren Link to comment Share on other sites More sharing options...
Auspex Posted April 30, 2016 Share Posted April 30, 2016 Hello Auspex, i tried to find out a translation of what carina means but i didn't, could you please tell me what it is ? On a tooth, it is a cutting edge. "There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant “Try to learn something about everything and everything about something.” - Thomas Henry Huxley >Paleontology is an evolving science. >May your wonders never cease! Link to comment Share on other sites More sharing options...
Omnomosaurus Posted April 30, 2016 Author Share Posted April 30, 2016 What I at first took to be a serrated carina appears to be a groove instead of a ridge; ~.jpg Is this so, or is it an illusion in the image? Hi Auspex, thanks for the response. They are indeed serrations running down the front-facing side in that photo. Here's another that hopefully looks a little clearer. The serrated edge is closest to the tape-measure, if you can make it out: Link to comment Share on other sites More sharing options...
Auspex Posted April 30, 2016 Share Posted April 30, 2016 Hi Auspex, thanks for the response. They are indeed serrations running down the front-facing side in that photo. Here's another that hopefully looks a little clearer. The serrated edge is closest to the tape-measure, if you can make it out: WP_20160430_18_56_51_Pro.jpg It is raised and not a groove; this is good, as otherwise I could not see it as a tooth. Others are more knowledgeable about Hell Creek dinosaurs, and may be able to do better, but all I can say is "carnivorous dinosaur". 1 "There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant “Try to learn something about everything and everything about something.” - Thomas Henry Huxley >Paleontology is an evolving science. >May your wonders never cease! Link to comment Share on other sites More sharing options...
Troodon Posted April 30, 2016 Share Posted April 30, 2016 (edited) Definitely a theropod tooth fragment and being from the Hell Creek most likely a tyrannosaur. With a serration count of something around 1/mm and the size of the specimen would say T rex, nothing else would fit. Edit: identifying teeth from Hell Creek http://www.thefossilforum.com/index.php?/topic/61069-identifying-theropod-teeth-from-the-hell-creeklance-fm/ Edited April 30, 2016 by Troodon 2 Link to comment Share on other sites More sharing options...
Omnomosaurus Posted April 30, 2016 Author Share Posted April 30, 2016 ~.jpg It is raised and not a groove; this is good, as otherwise I could not see it as a tooth. Others are more knowledgeable about Hell Creek dinosaurs, and may be able to do better, but all I can say is "carnivorous dinosaur". Well thank you very much for that Auspex; t'is very much appreciated. I've always hunted in nearby Carboniferous deposits here in the UK, so don't have too much experience identifying US dinosaur fossils. Link to comment Share on other sites More sharing options...
Omnomosaurus Posted April 30, 2016 Author Share Posted April 30, 2016 (edited) Definitely a theropod tooth fragment and being from the Hell Creek most likely a tyrannosaur. With a serration count of something around 1/mm and the size of the specimen would say T rex, nothing else would fit. Ah wow, thank you very much Troodon! That's made my day if it is, considering it was mixed in with a bunch of miscellaneous teeth. EDIT: Thanks for the link too. That's a very comprehensive guide you've compiled there - will definitely be one I save for future reference. Edited April 30, 2016 by Omnomosaurus Link to comment Share on other sites More sharing options...
Runner64 Posted April 30, 2016 Share Posted April 30, 2016 I agree with Troodon. Croc teeth do not have typically have serrations which makes this a theropod tooth and I agree this very well could be Tyrannosaur. Link to comment Share on other sites More sharing options...
DeepTimeIsotopes Posted May 1, 2016 Share Posted May 1, 2016 I agree with Troodon. Croc teeth do not have typically have serrations which makes this a theropod tooth and I agree this very well could be Tyrannosaur. Is there any croc teeth with serrations? Each dot is 50,000,000 years: Hadean............Archean..............................Proterozoic.......................................Phanerozoic........... Paleo......Meso....Ceno.. Ꞓ.OSD.C.P.Tr.J.K..Pg.NgQ< You are here Doesn't time just fly by? Link to comment Share on other sites More sharing options...
Runner64 Posted May 1, 2016 Share Posted May 1, 2016 Is there any croc teeth with serrations? I haven't seen any with serrations but have seen some with ridges. I'm not an expert with crocodiles but usually a croc tooth is fatter and and has ridges like I said earlier. 1 Link to comment Share on other sites More sharing options...
Troodon Posted May 1, 2016 Share Posted May 1, 2016 (edited) There are Croc with serrations in other localities but not the Hell Creek. Teeth of Hamadasuchus rebouli from the Cretaceous of Morocco are finely serrated. Edited May 1, 2016 by Troodon 1 Link to comment Share on other sites More sharing options...
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