DinoFossilsUK Posted September 25, 2022 Share Posted September 25, 2022 Hi! I have a tooth from the Gres Superieurs formation of Laos and I'm struggling with the ID. The person I acquired the tooth from suggested it was an undescribed spinosaurid - possibly Baryonychinae - due to the striations in the enamel. I'm not sure though, so I was hoping someone with more knowledge of teeth from Loas might be able to help me out. My first thoughts upon seeing the tooth were that it was likely to be a Pterosaur or fish tooth. It's certainly not Ichthyovenator as it's far too narrow. It's 0.88 inches long. Thanks in advance for any help! IMG_6481.HEIC IMG_6482.HEIC IMG_6483.HEIC Link to comment Share on other sites More sharing options...
Fin Lover Posted September 25, 2022 Share Posted September 25, 2022 Pictures in that format won't open. Can you please upload them directly to your post? 1 Fin Lover Link to comment Share on other sites More sharing options...
Fossildude19 Posted September 25, 2022 Share Posted September 25, 2022 They need to be in .png or .jpg format. 1 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...
DinoFossilsUK Posted September 26, 2022 Author Share Posted September 26, 2022 Oops! Sorry about that! Link to comment Share on other sites More sharing options...
Dino Dad 81 Posted September 26, 2022 Share Posted September 26, 2022 No denticles? Link to comment Share on other sites More sharing options...
DinoFossilsUK Posted September 26, 2022 Author Share Posted September 26, 2022 1 hour ago, Dino Dad 81 said: No denticles? I don't think there are any visible, but then it's fairly worn Link to comment Share on other sites More sharing options...
Troodon Posted September 26, 2022 Share Posted September 26, 2022 Could be a Spinosauridae, Ichthyovenator is described from there. Ronan (2014) believes its a Spinosaurinae with straight unserrated teeth. Not a lot published but like to see something if someone has info lets see it. Do you have a locality identifies it being from that Formation versus one from Thailand. 1 Link to comment Share on other sites More sharing options...
DinoFossilsUK Posted September 29, 2022 Author Share Posted September 29, 2022 On 9/26/2022 at 7:05 PM, Troodon said: Could be a Spinosauridae, Ichthyovenator is described from there. Ronan (2014) believes its a Spinosaurinae with straight unserrated teeth. Not a lot published but like to see something if someone has info lets see it. Do you have a locality identifies it being from that Formation versus one from Thailand. Very sorry, I didn't see your response. I believe its Savannakhet Province - I know the individual who traded me this tooth has other teeth from that formation too so I have no reason to question its provenance. I guess it's a possible Spinosaurid then. But out of interest, what would make you rule out the possibility of Pterosaur or fish in this case? Link to comment Share on other sites More sharing options...
Troodon Posted September 29, 2022 Share Posted September 29, 2022 We know very little so anything is possible. The vertical ridges support spinosaurid but the curvature is a unknown. Some similarity to ridges in Thailands Siamosaurus Link to comment Share on other sites More sharing options...
Dino Dad 81 Posted September 29, 2022 Share Posted September 29, 2022 I recently saw a big KK Spinosaurus tooth for sale from what I believe to be a reputable dealer and it had significantly more curvature, primarily in the proximal portion of the tooth, than I've seen before. Almost to a Plesiosaur extent (be clearly a Spinosaurus tooth). They were ID'ing it as a premax . If so, I'd have to imagine it was one of those large teeth in the very front. If it really was what it was ID'ed as, it suggested that Spinosaurus had a good deal more positional variation than I realized--and I've got a ton of Spinosaurus teeth. I've seen lots of positional variation in the curvature of Suchomimus teeth too. I mention this because my inexperienced suspicion is that the degree of curvature here doesn't work against a spinosaurid ID. Link to comment Share on other sites More sharing options...
DinoFossilsUK Posted September 29, 2022 Author Share Posted September 29, 2022 Yes, the ridges look very similar to those Siamosaurus teeth. And I've also seen a lot of variation in Kem Kem spino teeth, some with very distinct curvature, so I guess it's perfetcly possible it's a Spinosaurid. As always, thanks for enlightening me! Link to comment Share on other sites More sharing options...
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