Miocene Shark Teeth - ID

[ohhhkjk]

Hello!

 

I'm new to this forum and fossil hunting overall. 

 

I'd love some help identifying my best shark teeth finds so far (still holding out for some big ones). Especially the (partial?) on the top row, as it's very serrated and my biggest to-date. 

 

These are all from Calvert Cliffs, Matoaka / Long Beach area, and a couple from Flag Ponds, so all Miocene.

 

(Please let me know if it would be helpful to upload any other photos or info.)

 

Many thanks!

 

 

[Praefectus]

Nice finds. I was able to identify some for you. 

 

[ohhhkjk]

Thanks so much, @Praefectus!

 

How do you differentiate Physogaleus contortus from the Carcharhinus sp. if I might ask? For example, the second tooth, third row, (next to first one circled) also comes to a sharp slanted point and the end.  

 

Excited to confirm the Hemipristis serras!    

[Praefectus]

Oops. Looks like I mis-identified that one. It should also be Physogaleus contortus. General rule of thumb is that Physogaleus teeth have more pointed crowns and slightly thicker roots. 

 

[hemipristis]

On 11/15/2020 at 1:52 PM, ohhhkjk said:

How do you differentiate Physogaleus contortus from the Carcharhinus sp. if I might ask?

P. contortus is so named because of the characteristic contortion (twist) of the lower portion of the tooth crowns.

 

Welcome, btw!

The Carcharhinus teeth are difficult to identify to species, and even folks who have been collecting for years have a box/bag/container labeled Carcharhinus sp.

I might be able to help with one of them though.  Is the tooth circled in red really thin in cross section? When viewed from the side?  If so, it's likely from a Carcharhinus plumbeus, the sandbar shark