Lizard jaw?

[MrBones]

14 minutes ago, Al Dente said:

 

There's a similar one on this thread-http://www.thefossilforum.com/index.php?/topic/99524-fish-spine/

I have found exactly the same here in the UAE.

[Anomotodon]

On 10/31/2019 at 5:09 PM, FranzBernhard said:

I took the freedom to fiddle a little bit with your pics:

(There seems to be no difference between the supposed jaw (bone) and the supposed teeth, everything seem to be the same material.)

I agree that this is most likely a fin spine, but just wanted to note that lizards don’t actually have tooth sockets - they have acrodont or pleurodont dentitions where teeth are directly attached to the jaw. Thecodont dentition, when teeth are in alveoli, is known only from mammals and crocodiles (and extinct stuff in between)

 

here is a lizard jaw as an example

 

Edited July 7, 2021 by Anomotodon

[MrBones]

49 minutes ago, Anomotodon said:

I agree that this is most likely a fin spine, but just wanted to note that lizards don’t actually have tooth sockets - they have acrodont or pleurodont dentitions where teeth are directly attached to the jaw. Thecodont dentition, when teeth are in alveoli, is known only from mammals and crocodiles (and extinct stuff in between)

 

here is a lizard jaw as an example

 

 

Thanks for the info. I've actually managed to find a modern uromastyx jaw piece. I see what you mean by them not having sockets.