Per Christian Posted August 21, 2021 Share Posted August 21, 2021 I have been advised these teeth belong to an early Pliosaur called Rhomaleosaurus. They come from Lyme Regis. What do people here think? Do they seem good? Link to comment Share on other sites More sharing options...
TqB Posted August 21, 2021 Share Posted August 21, 2021 (edited) Rhomaleosaurus is restricted to the Upper Lias (Toarcian) I think and is mainly known from Yorkshire. I don't think you get it in Dorset - all of the plesiosaurs there are from the Lower Lias (Hettangian to Pliensbachian). I suspect those are ichthyosaur teeth - chunky ones from Temnodontosaurus for example - but I'm not an expert on them and am happy if someone disagrees! Edited August 21, 2021 by TqB 2 Tarquin Link to comment Share on other sites More sharing options...
Anomotodon Posted August 21, 2021 Share Posted August 21, 2021 (edited) It's hard to see on these pictures, but it looks like these teeth have carinae, meaning they are not plesiosaurian. They are from Temnodontosaurus, which, unlike most other ichthyosaurs have carinae. Edited August 21, 2021 by Anomotodon 2 2 The Tooth Fairy Link to comment Share on other sites More sharing options...
pachy-pleuro-whatnot-odon Posted August 22, 2021 Share Posted August 22, 2021 Tim is completely right in that they teeth belong to T. platyodon (my best guess as to species at the moment in absence of any good reference material for T. eurycephalus). This thread contains some more photographs for comparison. Rhomaleosaurid teeth from Lyme Regis look distinctly different - slender, conical and with striae on the lingual side of the tooth - and probably belonged to the species Eurycleidus arcuatus. Here are some photographs showing of that dental morphology (original post; please note that the top specimen, in fact, comes from Aust Cliff, even if it exhibits the same morphological features and is likely to belong to the same species): On 3/5/2021 at 2:56 PM, pachy-pleuro-whatnot-odon said: And another discussion on these same type of teeth: 3 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...
Per Christian Posted August 22, 2021 Author Share Posted August 22, 2021 Thanks everyone! I'm not looking for ichthyosaur teeth so I'll avoid this one.. this was very educational, and interesting Link to comment Share on other sites More sharing options...
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