PaleoNoel Posted May 2, 2020 Share Posted May 2, 2020 Here's an interesting looking partial bone I found in the Lance fm. of Wyoming back in 2018 with PaleoProspectors. The guide I was with thought it could've been from the hip region of a reptile, possibly a champsosaur. After a few years of gradually improving my identification ability I now think it's a partial sacrum, but I am not sure. I want to know what my fellow forum members have to say about it. 1 Link to comment Share on other sites More sharing options...
PFOOLEY Posted May 2, 2020 Share Posted May 2, 2020 Interesting piece...my first thought was that it was a worn bit of Hadrosaur jaw, rather than a sacrum. 4 "I am glad I shall never be young without wild country to be young in. Of what avail are forty freedoms without a blank spot on the map?" ~Aldo Leopold (1887-1948) New Mexico Museum of Natural History Bulletins Link to comment Share on other sites More sharing options...
LordTrilobite Posted May 2, 2020 Share Posted May 2, 2020 Yeah that's part of a jaw. Hadrosaur seems like a likely candidate. 3 Olof Moleman AKA Lord Trilobite Link to comment Share on other sites More sharing options...
Troodon Posted May 2, 2020 Share Posted May 2, 2020 I agree with the others looks like a jaw fragment but I have a different spin. I believe its too thin to be an Ornithischian like Thescelosaurus or Edmontosaurus they are more robust at the base and I dont recall seeing those holes. Another candidate is that its from a Theropod. I use my Troodon maxilla where the groove and holes are visible that is seen in your first photo. 5 Link to comment Share on other sites More sharing options...
PaleoNoel Posted May 2, 2020 Author Share Posted May 2, 2020 9 hours ago, PFOOLEY said: Interesting piece...my first thought was that it was a worn bit of Hadrosaur jaw, rather than a sacrum. 51 minutes ago, LordTrilobite said: Yeah that's part of a jaw. Hadrosaur seems like a likely candidate. 6 minutes ago, Troodon said: I agree with the others looks like a jaw fragment but I have a different spin. I believe its too thin to be an Ornithischian like Thescelosaurus or Edmontosaurus they are more robust at the base and I dont recall seeing those holes. Another candidate is that its from a Theropod. I use my Troodon maxilla where the groove and holes are visible that is seen in your first photo. Interesting! Not what I was expecting. Thank you for your input! Link to comment Share on other sites More sharing options...
TyBoy Posted May 2, 2020 Share Posted May 2, 2020 Sure looks like a jaw fragment. Much to thin and delicate to be hadrosaur. I like Troodon's call, theropod. 1 Link to comment Share on other sites More sharing options...
PaleoNoel Posted May 3, 2020 Author Share Posted May 3, 2020 11 hours ago, Troodon said: I agree with the others looks like a jaw fragment but I have a different spin. I believe its too thin to be an Ornithischian like Thescelosaurus or Edmontosaurus they are more robust at the base and I dont recall seeing those holes. Another candidate is that its from a Theropod. I use my Troodon maxilla where the groove and holes are visible that is seen in your first photo. 6 hours ago, TyBoy said: Sure looks like a jaw fragment. Much to thin and delicate to be hadrosaur. I like Troodon's call, theropod. 21 hours ago, PaleoNoel said: Thanks! Do you think it's part of a maxilla? Also are the gaps where the top of the root would be? I'm not really sure what the gaps are, but I do agree with your analysis having seen your troodon maxilla. Link to comment Share on other sites More sharing options...
Troodon Posted May 3, 2020 Share Posted May 3, 2020 I dont know not a lot to compare against. The gaps appear to be were the replacement teeth are popping out so it would be toward the base of the roots. Link to comment Share on other sites More sharing options...
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