Mosasaurus? Tooth fossil from Hokkaido japan

[poponpo]

I obtained a fossilized tooth from Hokkaido.

Do you know what kind of teeth they are?

There are no serrations.

The era is Cenomanian.

Mosasaurus?

[rocket]

Classic Mosasaurus is nearly not possible from Cenomanian age. Lot of discussions about the first and oldest one, that there are some cenomanian known, but I would assume this are not Mosas

Stone looks more like Hakobuchi-Formation, Yezo-Group for me. Than Mosa could be possible, tooth looks like

Edited June 18 by rocket

[poponpo]

Thank you for answering.

I thought it would be flat for a Mosasaurus.

I think their enamel is different from that of sharks.

[rocket]

1 hour ago, poponpo said:

Thank you for answering.

I thought it would be flat for a Mosasaurus.

I think their enamel is different from that of sharks.

yes, it is in deed very flat, you are right. Some are, but there are some known who are flat like this

might be another member has an idea

Edited June 18 by rocket

[pachy-pleuro-whatnot-odon]

7 hours ago, rocket said:

yes, it is in deed very flat, you are right. Some are, but there are some known who are flat like this

might be another member has an idea

 

I get the impression this tooth is trihedral rather than flat. Which wouldn't be a great match for mosasaur either. But maybe pliosaur or polycotylid?