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Unidentified Possibly Cochliodus


Samurai

One of my teeth that I really want to identify. It was mentioned it could be a broken or partial Petalodont crown minus the root.

 

 

13cm in size


From the album:

Chondrichthyan Teeth From The Pennsylvanian Period (Missouri)

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westcoast

Posted

Did you ever get an ID on this 'rectangular' tooth? 

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Samurai

Posted

On 2/9/2024 at 12:59 AM, westcoast said:

Did you ever get an ID on this 'rectangular' tooth? 

Oh! I am so sorry for the late reply as I never got the notification. Sadly I have not, besides a familial (mostly superficial) resemblence to the modern ratfish (probably from the same diet) I have not gotten any clear answers. 

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Jokes aside, a true Id may never come unless far into the future. I still have hope one day someone can help with this ID. 

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Samurai

Posted (edited)

On 2/9/2024 at 12:59 AM, westcoast said:

Did you ever get an ID on this 'rectangular' tooth? 

 

On 2/9/2024 at 12:59 AM, westcoast said:

Did you ever get an ID on this 'rectangular' tooth? 

I used to think these were front vomerine dental plates but after more analysis I belive this could be the upside down portion to the odd Janassid relatives I have been finding in the area recently. If only it was more complete. Take note of the slant on the left side.

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Here are the loose teeth fragments I have found recently. The slant looks very similar. 

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S20241002_0010.jpg.25392559861146958659b821efaf78c4.thumb.jpg.331439c36de8ab299beeb8d3294f4cf1.jpg

 

S20241003-0010.thumb.jpg.e044402f15b70cb30f18a383fccd326f.jpg

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I will have to clean the original tooth in order to see if there is any ribbing present. 

 

It does not seem to fit an exact diagram of janassid teeth I have found so far online, only closely. Here is a good diagram but it lacks the ribbing

 

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ghbi_a_2194902_f0008_oc.jpg.cf5b72827a42359e3fbb3742b210d1f3.jpg

 

Even in these the morphological differece can be seen as mine looks more flat around the apical cusp. It would be interesting if this is a new species but id have to contact people who are in the profession.

Edited by Samurai
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