Mystery crushing tooth (?) from the Calvert and Old Church Formations

[sharkdoctor]

I'd love a spot of help with a couple of teeth that have been vexing me lately! Thanks in advance for your thoughts.

 

Below are photos of several teeth that all seem to have some of the same characteristics. The first two are from the base of the Calvert Formation. The next three are from the Old Church formation, which directly underlies the Calvert Formation through parts of Central Virginia. I am assuming they are crushing type teeth based on what looks like attachment characteristics on the base and smooth, worn surfaces on the top.

 

The scale box is 5mm per side.

 

Tooth one, top, Calvert Formation:

 

Tooth one, bottom, Calvert Formation:

 

Tooth two, top, Calvert Formation:

 

Tooth two, bottom, Calvert Formation:

 

 

 

[sharkdoctor]

Tooth three, top, Old Church Formation:

 

Tooth three, bottom, Old Church Formation:

 

[sharkdoctor]

Tooth four, top, Old Church Formation:

 

Tooth four, bottom, Old Church Formation:

[sharkdoctor]

Tooth five, top, Old Church Formation:

 

Tooth five, bottom, Old Church Formation:

[Al Dente]

They might be lateral teeth from a myliobatis toothplate.

[sharkdoctor]

@Al Dente

Perhaps. I am not convinced at the moment. The attachment structures are so different. 

 

Here is a Myliobatus lateral from the same formation:

 

Myliobatus sp lateral tooth, scale box=5mm:

[siteseer]

They all might be fish scales especially that last one.  I think they're too small to be shell elements of even a baby sea turtle.  The thing that came to me at first glance for the first two was Brachyrhizodus tooth with the root worn away but they are too young and too small.

 

Jess