zekky Posted June 28, 2016 Share Posted June 28, 2016 Here is one tooth I am having issues with identifying. It's about 7/8" long. The serration just don't look like Allosaurus and are on average smaller(not nearly as small as Marshosaurus). The tooth is fairly thick for it's size. One side of the tooth is curved inward, which I have not seen before. Sadly the exterior serrations are mostly gone, but they look like they would have extended all the way. I read the research papers on both Allosaurus and Ceratosaurus, and I'm not sure. (I can't find anything on Stokesaurus btw) Slight curve to one side of the tooth. Close up of the enamel. The folds kin the tooth enamel are more prominent than I've seen. Quick a thick tooth Link to comment Share on other sites More sharing options...
Troodon Posted June 28, 2016 Share Posted June 28, 2016 Can you do a serration count midline on the distal side (5mm). Can you take a picture of the mesial carinae. Thanks Not sure you will find much on Stokesaurus but it may be a synonym for Tanycolagreus. I think your tooth is too big for these critters and better fits a large bodied theropod. 1 Link to comment Share on other sites More sharing options...
zekky Posted June 28, 2016 Author Share Posted June 28, 2016 (edited) The serrations are worn so the best i can do is a count in 3mm. But there were 9 serrations in that 3MM span. Sadly most of the serrations are worn off on the other side. (I just can't find anything on Tanycolagreus, Coelurus, and Stokesaurus teeth) Edited June 28, 2016 by zekky Link to comment Share on other sites More sharing options...
doushantuo Posted June 28, 2016 Share Posted June 28, 2016 It might be that the wee beastie is called Stokesosaurus. Link to comment Share on other sites More sharing options...
zekky Posted June 28, 2016 Author Share Posted June 28, 2016 Ehh google usually fixes that typing error Link to comment Share on other sites More sharing options...
doushantuo Posted June 28, 2016 Share Posted June 28, 2016 and Coelerus? Link to comment Share on other sites More sharing options...
doushantuo Posted June 28, 2016 Share Posted June 28, 2016 (edited) There's at least some stuff on tetanurid dentitions....* Tanycolagreus might be known from postcranial material only *https://www.app.pan.pl/archive/published/app60/app000562013.pdf Edited June 28, 2016 by doushantuo Link to comment Share on other sites More sharing options...
zekky Posted June 28, 2016 Author Share Posted June 28, 2016 But this tooth is likely from either Allosaurus or Ceratosaurus. The curve is the strange part of this tooth. (the quarry this come from has both species) Link to comment Share on other sites More sharing options...
Troodon Posted June 28, 2016 Share Posted June 28, 2016 (edited) In the end it's a partial tooth and coming up with a ID will be impossible in my opinion its best called Theropod indet. Having said that I make the following observations: It's not a Megalosaurid since the serrations are not correct for either Torvosaurus or Marchosaurus I don't think it's a Coelurosaur like Tanycolagreus or Stokesosaurus just because of the size of your tooth. The Skull of Tanycolagreus was reconstruction I saw it at the Natural History Museum in Utah, based on some cranial elements and 3 teeth and its not big. Your tooth with a tip and base added could be around 1 1/2" fits a large bodied theropod. The serrations, distal count and shape are consistent with Ceratosaur's found in the Morrison, Portugal and Uruguay. The shape and size of the tooth also work. That's my leading candidate but there are lots of critters in the Morrison. Edited June 28, 2016 by Troodon 1 Link to comment Share on other sites More sharing options...
zekky Posted June 28, 2016 Author Share Posted June 28, 2016 That was my conclusion, maybe Ceratosaur, but can't be definitive. Link to comment Share on other sites More sharing options...
MarcusFossils Posted June 30, 2016 Share Posted June 30, 2016 (edited) Looks a lot like an Albertasaurus tooth I have...any reason to rule out some smaller species of tyrannosaurid? Assuming you're in Utah: https://en.wikipedia.org/wiki/Lythronax Jaw, top view showing the same curvy teeth: Edited June 30, 2016 by MarcusFossils Website: https://www.instagram.com/paleo_archives/ --------------------------------------------------------------------------- “It is by no means an irrational fancy that, in a future existence, we shall look upon what we think our present existence, as a dream.” ― Edgar Allan Poe Link to comment Share on other sites More sharing options...
zekky Posted July 1, 2016 Author Share Posted July 1, 2016 No, it's 100% Morrison Formation. I had a chance today to see some other teeth with that inner curve, I strongly believe this tooth to be a Ceratosaurus. The thickness is my only concern with that label at this point. Link to comment Share on other sites More sharing options...
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