Lyme Regis Pliosaur teeth?

[Per Christian]

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?

 

 

                

[TqB]

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

[Anomotodon]

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

[pachy-pleuro-whatnot-odon]

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:

 

[Per Christian]

Thanks everyone! I'm not looking for ichthyosaur teeth so I'll avoid this one.. this was very educational, and interesting