Ptychodus

[Dan Wendt]

Might this be a ptychodus shark tooth?  It was found in Ostrander Gravel (presumed late Cretaceous) near Austin, Minnesota. 

 

 

[Fossildude19]

I think further preparation would be required, but it doesn't look like Ptychodus to me. 

[Anomotodon]

Very interesting, I did not know there were Cretaceous deposits in SE Minnesota! I agree, this needs to be prepped more to properly identify. Although I can see it potentially being a Ptychodus - if it’s viewed from the side and the occlusal ridge is in matrix.

[Dan Wendt]

Does this initial prep help orient the tooth.  I believe it is a side view with the occlusal ridge across the top.   Thank you.

[LSCHNELLE]

I don't think that is a Ptychodus tooth. Two straight sided bottom and right edges are not a features you would see on a Ptychodus. This could be an unusual clam or a fragment of another fossil. Also, the ridges are usually fairly uniform in spacing. These appear to have some irregularities.

[Ludwigia]

I agree. This is starting to look like it might be a member of the Trigoniidae.

[Dan Wendt]

On 11/15/2024 at 2:16 AM, Ludwigia said:

I agree. This is starting to look like it might be a member of the Trigoniidae.

Good call.  I see it.  Thank you.

 

 

[PFOOLEY]

I think this is an interesting find worthy of further research. 

 

I can't help but still see a tooth of some sort. @Dan Wendt, are you able to take clearer pictures from different angles?

[doushantuo]

I tend to agree with Tim and Ludwigia