Aurora NC micro fossil - cow shark posterior (commissural) tooth?

[TRout]

I found this interesting little fossil while searching through micro matrix from Aurora NC (Pungo River and Yorktown Formations). My first thought was that this could be a commissural tooth from a cow shark (I believe both sixgill and sevengill sharks are known from this location). I haven't had great luck finding pictures of fossilized cow shark commissural teeth to compare to, as these tiny teeth are understandably scarce in the fossil record. I did read through a discussion about commissural teeth in the "Extreme posterior shark teeth!" thread here on the forum, which was very helpful. I hope to get some opinions on this fossil and potential ID. Has anyone found a cow shark commissural tooth from Lee Creek/Aurora and have any pictures they'd be willing to share? Here are pictures of the front and back of the fossil, it measures just over 3mm.

Here's a picture of some modern broadnose sevengill shark (Notorynchus cepedianus) commissural teeth that I used for comparison. I think these could be a good match to my fossil, and I'm curious to hear others' thoughts.

[Al Dente]

9 hours ago, TRout said:

My first thought was that this could be a commissural tooth from a cow shark

I think you are correct.

[MarcoSr]

Some individual extant commissural teeth pictures to compare your specimen to.  These teeth are very rare in the fossil record partially because of their small size plus I don't know if shark commissural teeth are shed during life like regular teeth.

 

 

 

 

 

 

 

Marco Sr.