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bthemoose

Following up on the artificial tooth set I recently constructed for the Paleocene sand tiger shark Striatolamia striata, I decided to see if I could put one together for the Miocene snaggletooth, Hemipristis serra, using teeth I've collected along the Calvert Cliffs in Maryland. 

 

I haven't found a great resource for an H. serra dentition, but I consulted a few different sources to get a sense for the arrangement, including Fossilguy.comJ-elasmo (which has a dentition for the extant H. elongata), and various TFF threads.

 

The resulting tooth set is below. While I've found quite a few H. serra teeth, their abundance from the cliffs isn't anywhere near that of S. striata from the Potomac River, so this one was a bit more challenging to construct. In addition to several fairly worn teeth in my set, some that I've slotted into various jaw positions are likely a bit more fanciful than the last one. The best extreme posteriors I've collected are proportionally too large, so I also had to use less good substitutes for those positions. 

 

The largest teeth below are about 1.25" inches in length. Most of these were collected from Matoaka Beach over the last year, but I found a few of them from Brownie's Beach and Calvert Cliffs State Park.

 

The full tooth set:

 

IMG_0294.thumb.jpeg.10365b548e1a7a1730e8f8ac23ca366b.jpeg

 

Quadrants:

 

IMG_0298.thumb.jpeg.86f0c71359be176c474fc3122c9cabb6.jpeg

 

IMG_0297.thumb.jpeg.db90bc8faf7f941ce06b8a9a24c2af24.jpeg

 

IMG_0299.thumb.jpeg.76f8ae90e3994a4723fcb315d0566872.jpeg

 

IMG_0300.thumb.jpeg.4c456fa7a8c9dfb7f204d2a0b0ff09ba.jpeg

 

Finally, here are some better examples of extreme posterior teeth. Both of these are a tad over 0.7" long.

 

IMG_0306.thumb.jpeg.bfe036e876aa254ac0a3f22d9d6ab5a6.jpeg

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Ludwigia

Very good! :Smiling:

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Have a look on my upper teeth of my Hemipristis elongata jaw : the parasymphyseal teeth.

 

 

Hemipristis-elongatus.jpg.ccadc9724b8a72c03580748b3ad75e08.jpg

 

Coco

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Very nice, congrats!   :thumbsu:

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bthemoose
1 hour ago, Ludwigia said:

Very good! :Smiling:

 

31 minutes ago, Gizmo said:

Very nice, congrats!   :thumbsu:

 

Thank you!

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bthemoose
44 minutes ago, Coco said:

Have a look on my upper teeth of my Hemipristis elongata jaw : the parasymphyseal teeth.

 

 

Hemipristis-elongatus.jpg.ccadc9724b8a72c03580748b3ad75e08.jpg

 

Coco

 

Thanks, Coco! Yes, I am quite certain that I don't have the parasymphyseals correct. I believe I have two lower ones, but I haven't found any of the uppers yet, so I just used smaller, somewhat more compressed teeth in my dentition as placeholders for now.

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bthemoose
On 4/12/2021 at 9:54 PM, historianmichael said:

Very cool!

 

Thanks!

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H.Serra

It is better than some of the dentitions I have seen on the internet for H.Serra, Bretton Kent's book; Fossil Sharks of the Chesapeake Bay Region has a nice illustration of H. Elongatus dentition which might be helpful

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bthemoose
1 hour ago, H.Serra said:

It is better than some of the dentitions I have seen on the internet for H.Serra, Bretton Kent's book; Fossil Sharks of the Chesapeake Bay Region has a nice illustration of H. Elongatus dentition which might be helpful

 

Thanks -- the Kent diagram is definitely helpful too.

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