Heterodontus tooth?

[Kolya]

Could it be tooth of Heterodontus?

Scale in mm.

Western Ukraine, cretaceus or paleogene.

Thanks!

[Troodon]

Possibly an Upper hexanchus 

[Kolya]

5 minutes ago, Troodon said:

Possibly an Upper hexanchus 

Thanks!

[Kolya]

What about this tooth. In my opinion this one also similar to upper anterior tooth of Hexanchiformes, but bigger than first tooth.

The same place.

Thanks!

[siteseer]

Hi Kolya,

 

That first tooth might be Pseudomegachasma.  You might want to look for the article on that.

 

I don't know about the second tooth but it appears pathologic.

 

Jess

[Kolya]

2 hours ago, siteseer said:

Hi Kolya,

 

That first tooth might be Pseudomegachasma.  You might want to look for the article on that.

 

I don't know about the second tooth but it appears pathologic.

 

Jess

Hello, Jess!

Thank You very much!

I will find some paper to compare.

Have a good day!)

[Kolya]

14 hours ago, siteseer said:

Hi Kolya,

 

That first tooth might be Pseudomegachasma.  You might want to look for the article on that.

 

I don't know about the second tooth but it appears pathologic.

 

Jess

Thanks once more, Jess!

Yes, crown looks similar to Pseudomegachasma.