Onchosaurus or Onchopristis

[Othniel C. Marsh]

I recently saw this sawfish rostral barb up for sale as that of an Onchosaurus, but it looks very similar to those sold as Onchopristis: so which is it?

 

 

Thanks in advance for any guidance

Othniel

[Kikokuryu]

Cenomanian aged Kem Kem Onchopristis numida.

 

Onchosaurus has a different morphology and I think comes from the Maastrichtian phosphates.

[Othniel C. Marsh]

Thanks Kikokuryu