Thank you for your enquiry. Please can you tell us where you collected these teeth and identify which specimens are imaged in different orientations.
Apologies for the delay in response due to illness.
I forwarded the link to one of our specialist who says :
"I can't see any pterosaur teeth there, but there is an odd tooth that someone has said looks like a belemnite phragmocone. This one is weird but I think it is a tooth.
The second one is very polished- is that from Potton? The fossils there are reworked from older strata.
The last one looks ichthyosaur-ish or pliosaur-ish to me"......
The best thing to do would be to visit or post them in to the Angela Marmont Centre, Natural History Museum, London, however, we need to know the locality - where they came from. The specialist concludes with:
"Cool- I look forward to hearing more about this nice collection!".
Hope you can visit us so that we can see your interesting collection.
Very best wishes,
Thanks very much. I'm in Scotland but occasionally in London so will bring them in if I can. The 3rd and 4th photos are the same tooth. Basically if it looks like the same tooth, it is the same tooth, as all of the fossil teeth I have look very different. I agree the 5th one does look like a belemnite phragmacone - sorry don't have another pic of that one right now but could send later - here's some more of the others below. Unfortunately I don't have good locality information; I bought them all for 50p in 1986 off an old guy in Gloucestershire who said he had collected them from various quarries, I got the impression mostly locally but nothing definite I am afraid. I do have some other good fossils I've collected myself though, so I will post some pics of some with better locality info next time. Interesting that such different teeth can all be from crocs (although I guess crocodilians are a big group) and also very interesting that one may be from an ichthyosaur or pliosaur.