Potomac River Micros

[bthemoose]

I recently brought home a gallon bag of Potomac River gravels (Paleocene, Aquia Formation), and have been searching through them for micros using my new digital microscope (the quite reasonably priced Plugable USB 2.0 Digital Microscope, which several others on TFF have recommended). I've found a number of shark teeth and have tentatively IDed many of them, though would appreciate corrections or confirmations, as well as thoughts on the unidentified ones.

 

The tick marks in all of the photos below are millimeters.

 

Thanks in advance for your help!

 

1. Abdounia beaugei

 

2. Galeorhinus sp. -- half the tooth is missing so may of course be unidentifiable

 

3. Squalus minor

 

4. Another Squalus minor

 

5. Megasqualus orpiensis

 

6. Triakis sp.

 

7. Possibly Premontreia degremonti?

 

8. Possibly Odontaspis winkleri?

 

9. No idea

 

10. Unidentified sand tiger

 

11. Unidentified sand tiger

 

12. Unidentified sand tiger

 

13. Unidentified sand tiger

[Paleome]

Sorry, don't know much about shark teeth, so I can't help you there.  What I need to know from you are some details about your "new digital microscope (the quite reasonably priced Plugable 2.0 Digital microscope, which several others on TFF have recommended)."

It looks like it could very nicely do the job on some of my specimens.  Please PM me.  Thank you, Debra

[Al Dente]

9 hours ago, bthemoose said:

9. No idea

This looks like Foumtizia, a type of catshark.

[bthemoose]

2 hours ago, Al Dente said:

This looks like Foumtizia, a type of catshark.

Thank you!