Chimaera dental plate?

[sjaak]

Could this be a chimaera or rather Ischyodus dental plate? 

 

Upper Jurassic of Boulonnais, North of France.

 

 

 

[Al Dente]

It is the right shape for a chimaera jaw. Not sure if it is Ischyodus.

[Carl]

I'm seeing a chimaeroid, too. That's HUGE!!!

[sjaak]

Thank you very much for your reactions and confirmation. The jaw is rather big indeed. I always have difficulty visualizing how these jaw plates fit in a chimaera and how they were used. 

There appears to be a tiny tooth on the jaw, which you can see on the last picture. Does this fit with cimaera? Or could it be a loose tooth from another fish? 

[Carl]

Chimaeroids are toothless so that much be a bonus find!

[sjaak]

Yes that must be so. Thanks!

[MarcoSr]

12 hours ago, sjaak said:

 I always have difficulty visualizing how these jaw plates fit in a chimaera and how they were used.

 

Check out the short video at the below link.  It will help you to visualize how the jaw plates fit together in a chimaera.

 

https://experiment.com/projects/tooth-plates-in-chimaeras-and-their-relationship-to-teeth-in-sharks

 

Marco Sr.

[sjaak]

2 hours ago, MarcoSr said:

 

Check out the short video at the below link.  It will help you to visualize how the jaw plates fit together in a chimaera.

 

https://experiment.com/projects/tooth-plates-in-chimaeras-and-their-relationship-to-teeth-in-sharks

 

 

Marco Sr.

 

Just what I needed. Thanks!

[Carl]

On 4/5/2019 at 3:10 PM, MarcoSr said:

 

Check out the short video at the below link.  It will help you to visualize how the jaw plates fit together in a chimaera.

 

https://experiment.com/projects/tooth-plates-in-chimaeras-and-their-relationship-to-teeth-in-sharks

 

 

Marco Sr.

That video was FANTASTIC! I also didn't have a great hold on how their dentition worked. Thanks for sharing that!