Jump to content
Ludwigia

Notorynchus ?

Recommended Posts

Ludwigia

Took another trip to one of my Miocene Burdigalian sites on my bike again today and I was just wondering if this set of teeth might come from a Notorynchus cepedianus shark.

 

P100a.thumb.jpg.0a00570f65cfb05255837ef56ac92b8e.jpg

P100b.thumb.jpg.0a2c08674debe74466c1bf24cb08f6f5.jpg

 

Share this post


Link to post
Share on other sites
Ludwigia

Come to think of it, here are 2 more which I found a while ago where I'm still not sure if they also belong to the genus Notorynchus. They're both sort of thick, which makes me unsure.

 

P99ba.thumb.jpg.ac39dfa8c4d2da72ea5a113849f3586b.jpg

P99bb.jpg.72adbd649c4e08c73b2d0b4dc169337b.jpg

P99bc.jpg.39b2050982ffe89dced009bc7ca2ba1f.jpg

 

 

 

P99aa.jpg.8ca45523c96bac2410a19e3292ac6891.jpg

P99ab.jpg.818d0788f8bff6360c320a00ae15c21e.jpg

 

Share this post


Link to post
Share on other sites
ynot

The first is a "yes".

The other two look like upper symphyseal teeth (same species).

Share this post


Link to post
Share on other sites
Ludwigia
1 minute ago, ynot said:

The first is a "yes".

The other two look like upper symphyseal teeth (same species).

Thanks for the quick determination, Tony :)

Share this post


Link to post
Share on other sites
Ludwigia

Please excuse me, but I'm having to revise these to N. primigenius. I'd forgotten completely about this website                    

Share this post


Link to post
Share on other sites
MarcoSr

I agree that the first tooth is Notorynchus.  However, I don't think the next specimen is even a shark tooth because it is too rounded without a visible cutting edge but that may be due to water wear.  The second specimen really doesn't have the root or crown features of a Notorynchus upper parasymphyseal tooth.  It looks more like a ray dermal denticle to me.  But pictures can be very deceiving.  See the extant Notorynchus cepedianus jaw below from elasmo.com:

 

 

image.png.61a6a17df54ec59836afee29712fe76c.png

 

 

The third specimen is really interesting.  It is difficult to tell from the pictures but If a shark tooth it could be a cetorhinus (but they have a cutting edge) or even something like a ray tooth from a manta.

 

Marco Sr.

Share this post


Link to post
Share on other sites
Ludwigia
On 11.8.2018 at 4:52 PM, MarcoSr said:

I agree that the first tooth is Notorynchus.  However, I don't think the next specimen is even a shark tooth because it is too rounded without a visible cutting edge but that may be due to water wear.  The second specimen really doesn't have the root or crown features of a Notorynchus upper parasymphyseal tooth.  It looks more like a ray dermal denticle to me.  But pictures can be very deceiving.  See the extant Notorynchus cepedianus jaw below from elasmo.com:

 

 

image.png.61a6a17df54ec59836afee29712fe76c.png

 

 

The third specimen is really interesting.  It is difficult to tell from the pictures but If a shark tooth it could be a cetorhinus (but they have a cutting edge) or even something like a ray tooth from a manta.

 

Marco Sr.

Thanks for your help Marco. Sorry it took so long to answer, but I just noticed your post now.

 

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Recently Browsing   0 members

    No registered users viewing this page.

×