Alston Gee Posted November 19, 2023 Share Posted November 19, 2023 I recently came across a "Dolichorhynchops" tooth listed for sale by a US seller. However, I am unable to personally verify its identity due to my limited knowledge of polycotylid teeth. Based on the provided pictures, the tooth fossil exhibits a strong curvature and appears to have ornamentation solely on its lingual surface. Do these characteristics suggest that it belongs to Dolichorhynchops? Link to comment Share on other sites More sharing options...
Darktooth Posted November 19, 2023 Share Posted November 19, 2023 Ask the seller for close-up pics of this tooth. I like Trilo-butts and I cannot lie. Link to comment Share on other sites More sharing options...
Praefectus Posted November 19, 2023 Share Posted November 19, 2023 36 minutes ago, Alston Gee said: curvature This excludes Dolichorhynchops. It is a russellosaurine mosasaur tooth. Probably Tylosaurus. 1 Link to comment Share on other sites More sharing options...
Coco Posted November 23, 2023 Share Posted November 23, 2023 How did you see the photos ? I don’t see them, the links are broken for me. Coco 1 ---------------------- OUTIL POUR MESURER VOS FOSSILES : ici Ma bibliothèque PDF 1 (Poissons et sélaciens récents & fossiles) : ici Ma bibliothèque PDF 2 (Animaux vivants - sans poissons ni sélaciens) : ici Mâchoires sélaciennes récentes : ici Hétérodontiques et sélaciens : ici Oeufs sélaciens récents : ici Otolithes de poissons récents ! ici Un Greg... Link to comment Share on other sites More sharing options...
pachy-pleuro-whatnot-odon Posted November 23, 2023 Share Posted November 23, 2023 4 hours ago, Coco said: How did you see the photos ? I don’t see them, the links are broken for me. Same here. Could have to do with the upgrade 🤷♂️ However, if you could repost the photographs, we could have another look. 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...
Coco Posted November 23, 2023 Share Posted November 23, 2023 They may have been seen before the forum switched to its new destination... Coco ---------------------- OUTIL POUR MESURER VOS FOSSILES : ici Ma bibliothèque PDF 1 (Poissons et sélaciens récents & fossiles) : ici Ma bibliothèque PDF 2 (Animaux vivants - sans poissons ni sélaciens) : ici Mâchoires sélaciennes récentes : ici Hétérodontiques et sélaciens : ici Oeufs sélaciens récents : ici Otolithes de poissons récents ! ici Un Greg... Link to comment Share on other sites More sharing options...
Alston Gee Posted November 24, 2023 Author Share Posted November 24, 2023 20 hours ago, pachy-pleuro-whatnot-odon said: Same here. Could have to do with the upgrade 🤷♂️ However, if you could repost the photographs, we could have another look. 17 hours ago, Coco said: They may have been seen before the forum switched to its new destination... Coco Here are the photos: 1 Link to comment Share on other sites More sharing options...
pachy-pleuro-whatnot-odon Posted November 24, 2023 Share Posted November 24, 2023 I also got a couple of teeth from this batch, and have included some photographs of three teeth below for comparison: While not particularly visible in the photographs you posted, the above specimens all have clear carinae, which is something a plesiosaur tooth would not have. They're also much more triangular in shape, rather than conical or subtrihedral, which, again, excludes plesiosaur. Finally, the striae present in ornamentation differ from those you'd encounter on a plesiosaur tooth, which more clearly lie on top of the enamel and have a more triangular cross-section. When I bought them, I was also hoping to get myself some polycotylid teeth. However, ultimately, I ended up classifying them as plioplatecarpine. Below are a couple of photographs of teeth from Dolichorhynchops osborni, so you can tell the difference. (source) 2 '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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