Two teeth from the Kem Kem Beds

[Compy]

I also found these two teeth at our local fair. I bought them despite of the lack of information privided because the spinosaurid tooth (if it is spinosaurid and not mosasaur) was pretty cheap for its size and the other tooth which was labeled "Rebbachisaurus garasbae" had an unusal shape in contrast to all the other material from Kem Kem that is available here.

 

The seller only provided the information that both teeth are from the Kem Kem Beds of Morocco.

 

This is the tooth that was labeled as Spinosaurus aegyptiacus. But from my previous tooth I know that one cannot differentiate between S. aegyptiacus and Sigilmassasaurus so that it should be labeled as "Spinosaurus indet.". Is this correct?

 

[Compy]

And this tooth was labeled as "Rebbachisaurus garasbae" but I have too little experience from my comparisons with similar teeth to confirm this. By comparing it with the teeth found here in this post: 

I would tend to call it Titanosauriform. Can someone more familiar with these teeth please help me?

Thank you very much in advance!

Edited November 7, 2019 by Compy
I added a link to Troodon's post.

[Compy]

Do we have a specialist for Kem Kem material here in the forum who can confirm my ID or tell me that I am wrong? ;-)

Thank you very much in advance!

[Troodon]

All Spino teeth should be currently identified as Spinosaurid indet for the reason you stated. Also agree with your Sauropod tooth call it's a Titanosaurid indet 

[Troodon]

Let me add that S. aegyptiacus is viewed by many paleontologists has only valid in Egypt so still lots of open questions on the theropods of the KK

[Compy]

Thank you Troodon!

Do you know if there is some research on the dinosaurs in Kem Kem?

I spoke to one of the sellers and he told me that (at least for him as seller here in Germany) it is increasingly getting hard to find new material and that it seems like the Kem Kem region is running out of fossils...

I am not sure if thats true or just a single impression..

[Troodon]

Not aware of anything specific but I'm sure there is plenty being done.  Material is constantly being found and we periodically we see papers but few on teeth simply because they are just not finding skull material with teeth.   I'm hoping that we see a paper that discusses Dromaeosaurid-like teeth which is a big open question, do they exist in the in KK deposits.

My discussion with higher end dealers indicates that the areas with easier access and better preserved material has either dried up or is no longer accessible   So what coming out has poorer preservation and is harder to get but available.  If you go to shows like Tucson there is still lots of dinosaur material sold, nothing articulated just isolated bones and tons of teeth.

[Compy]

On 8.11.2019 at 9:50 PM, Troodon said:

If you go to shows like Tucson there is still lots of dinosaur material sold, nothing articulated just isolated bones and tons of teeth.

I would love to go to such big shows but unfortunately the costs for travelling to Arizona (from Germany) are nearly as high as my expenditures for teeth this year... ;-)