Galeocerdo cuvier

Nice tooth, looks more like Galeocerdo aduncus than G. cuvier.

On 2/25/2021 at 11:51 PM, Al Dente said:

Nice tooth, looks more like Galeocerdo aduncus than G. cuvier.

Thanks @Al Dente!

Doesn't the existence of secondary serrations correspond to the G. cuvier?

Some aduncus have secondary serrations. Here an example from Brett Breakin’ Rocks album http://www.thefossilforum.com/index.php?/gallery/image/47255-galeocerdo-aduncus-01/

The earliest G. cuvier that I’m aware of are from the Pliocene.

10 hours ago, Al Dente said:

Some aduncus have secondary serrations. Here an example from Brett Breakin’ Rocks album http://www.thefossilforum.com/index.php?/gallery/image/47255-galeocerdo-aduncus-01/

 

The earliest G. cuvier that I’m aware of are from the Pliocene.

 

 

The formation where I found it is Miocene.
How to spot the differences between the two?

Size is a big difference. G. cuvier are much larger and thicker. Here are some from the Lee Creek mine. The  aduncus are on the right and the width are from 1.5 to around 1.9 cm. The G. cuvier are on the left and the width is around 2.5 to 3 cm.  The outline of the teeth are a little different too.