MedicineHat Posted November 3, 2020 Share Posted November 3, 2020 Hello, My 9 year old son found this cool jaw section. It may be coincidental, but beside it was an ankylosaur tooth, partially rooted. We are unsure if it was associated. Perhaps someone will find this interesting or know more. Will post more photos if necessary. 2 Link to comment Share on other sites More sharing options...
Fossildude19 Posted November 3, 2020 Share Posted November 3, 2020 A few more photos of both sides, bottom, and front and back would be helpful. Also, something for size reference? 1 Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
MedicineHat Posted November 3, 2020 Author Share Posted November 3, 2020 3 minutes ago, Fossildude19 said: A few more photos of both sides, bottom, and front and back would be helpful. Also, something for size reference? 1 Link to comment Share on other sites More sharing options...
MedicineHat Posted November 3, 2020 Author Share Posted November 3, 2020 1 Link to comment Share on other sites More sharing options...
MedicineHat Posted November 3, 2020 Author Share Posted November 3, 2020 1 Link to comment Share on other sites More sharing options...
MedicineHat Posted November 3, 2020 Author Share Posted November 3, 2020 The nodosaur tooth was not found in the jaw. We set it up for fun. We couldn't help it...it just fit so nicely 1 Link to comment Share on other sites More sharing options...
jpc Posted November 3, 2020 Share Posted November 3, 2020 That is very unnusual (at least to me). the teeth, what little is there look like varanid lizard, but that would be a big Cretaceous dinosaur. I am not familiar with the DP fauna, but if there s a large varanid known from there... then that is what I would call it. 2 Link to comment Share on other sites More sharing options...
Troodon Posted November 3, 2020 Share Posted November 3, 2020 Nice find but its not does not look like a Nodosaur jaw. Here is a Nodosaur from Spain The Basal Nodosaurid Ankylosaur Europelta carbonensis n. gen., n. sp. from the Lower Cretaceous (Lower Albian) Escucha Formation of Northeastern Spain James I. Kirkland, Luis Alcala, Mark A. Loewen, Eduardo Espı´lez, Luis Mampel, Jelle P. Wiersma 1 Link to comment Share on other sites More sharing options...
dinosaur man Posted November 3, 2020 Share Posted November 3, 2020 17 hours ago, jpc said: That is very unnusual (at least to me). the teeth, what little is there look like varanid lizard, but that would be a big Cretaceous dinosaur. I am not familiar with the DP fauna, but if there s a large varanid known from there... then that is what I would call it. I agree I would probably say it’s Palaeosaniwa sp. or something similar 1 Link to comment Share on other sites More sharing options...
pachy-pleuro-whatnot-odon Posted November 3, 2020 Share Posted November 3, 2020 Awesome find! But, yeah, as has been pointed out, the tooth and jaw don't go together. I think Dinosaur Man's suggestion of Palaeosaniwa sp. could be a very good suggestion. 1 'There's nothing like millions of years of really frustrating trial and error to give a species moral fibre and, in some cases, backbone' -- Terry Pratchett Link to comment Share on other sites More sharing options...
jpc Posted November 3, 2020 Share Posted November 3, 2020 Edit... I meant a big Cretaceous varanid, not dinosaur. I will try to look into the size of Paleosaniwa. 1 Link to comment Share on other sites More sharing options...
Troodon Posted November 4, 2020 Share Posted November 4, 2020 Any chance this is a Champsosaurus jaw section 3 Link to comment Share on other sites More sharing options...
jpc Posted November 4, 2020 Share Posted November 4, 2020 Ooh, I like that... champsosaur, but I would like to see a side view of the champsosaur dentary. 1 Link to comment Share on other sites More sharing options...
pachy-pleuro-whatnot-odon Posted November 4, 2020 Share Posted November 4, 2020 Oh wow, haven't ever seen too much Champsosaur material, but nice plate! I too like the suggestion. Sounds very possible, though not the symphysial part, I think, as both sides of the mandible look flat, with no trace of where it would have went... 1 'There's nothing like millions of years of really frustrating trial and error to give a species moral fibre and, in some cases, backbone' -- Terry Pratchett Link to comment Share on other sites More sharing options...
Troodon Posted November 4, 2020 Share Posted November 4, 2020 14 hours ago, jpc said: Ooh, I like that... champsosaur, but I would like to see a side view of the champsosaur dentary. 1 Link to comment Share on other sites More sharing options...
pachy-pleuro-whatnot-odon Posted November 4, 2020 Share Posted November 4, 2020 For comparison, here are some photographs of a Champsosaurus lemoinei specimen in the Museum voor Natuurwetenschappen in Brussels. OP's specimen seems rather small compared to this, but could potentially be from either a subadult, juvenile or different species of champsosaur. Also, by comparison to the Brussels' specimen (thickness, angularity and spacing of teeth), I'd say the jaw section could have only come from the middle of the mandible, if champsosaur it is at all... Now, if only we could get some similar images of Palaeosaniwa sp. to compare against, we could determine how well that suggestion holds up 1 'There's nothing like millions of years of really frustrating trial and error to give a species moral fibre and, in some cases, backbone' -- Terry Pratchett Link to comment Share on other sites More sharing options...
Troodon Posted November 4, 2020 Share Posted November 4, 2020 From Derek Larson ROM 2 Link to comment Share on other sites More sharing options...
pachy-pleuro-whatnot-odon Posted November 4, 2020 Share Posted November 4, 2020 Could just be me, but looks deeper/taller than the champsosaur. However, the thickness of the jaw versus the size of the teeth, as well as the spacing between them seems quite similar to OPs jaw. But this could, of course, just depend on the location along the jaw (that is, I'm assuming the above specimen is a fragment)... Still, I need to agree, champsosaur seems a better match. 1 'There's nothing like millions of years of really frustrating trial and error to give a species moral fibre and, in some cases, backbone' -- Terry Pratchett Link to comment Share on other sites More sharing options...
MedicineHat Posted November 5, 2020 Author Share Posted November 5, 2020 On 2020-11-03 at 7:25 PM, Troodon said: Any chance this is a Champsosaurus jaw section This looks identical from what I can tell...champsasaur vertebra all over the place...why not a small jaw plate?! Link to comment Share on other sites More sharing options...
MedicineHat Posted November 5, 2020 Author Share Posted November 5, 2020 22 hours ago, pachy-pleuro-whatnot-odon said: For comparison, here are some photographs of a Champsosaurus lemoinei specimen in the Museum voor Natuurwetenschappen in Brussels. OP's specimen seems rather small compared to this, but could potentially be from either a subadult, juvenile or different species of champsosaur. Also, by comparison to the Brussels' specimen (thickness, angularity and spacing of teeth), I'd say the jaw section could have only come from the middle of the mandible, if champsosaur it is at all... Now, if only we could get some similar images of Palaeosaniwa sp. to compare against, we could determine how well that suggestion holds up Thanks for sharing! Very cool. I think it's possible it could be champsosaur. There are lots of marine dinosaurs such as gar croc turtle sturgeon and others in the area. I know nothing about the mammals or amphibians and other small reptiles. I'm used to identifying /collecting more big stuff Link to comment Share on other sites More sharing options...
pachy-pleuro-whatnot-odon Posted November 5, 2020 Share Posted November 5, 2020 3 hours ago, MedicineHat said: Thanks for sharing! Very cool. I think it's possible it could be champsosaur. There are lots of marine dinosaurs such as gar croc turtle sturgeon and others in the area. 3 hours ago, MedicineHat said: This looks identical from what I can tell...champsasaur vertebra all over the place...why not a small jaw plate?! Looks like this mystery is solved then 'There's nothing like millions of years of really frustrating trial and error to give a species moral fibre and, in some cases, backbone' -- Terry Pratchett Link to comment Share on other sites More sharing options...
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