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Bizarre Hell Creek Denticle?


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Hi all. I know it's been a long time since I've posted anything on the forum, but now that I'm back from college I'm planning on being more active. Today I wanted to post this odd fossil I found this past summer at a Hell Creek formation microsite in eastern Montana. I've never seen anything quite like it before, but my guess is that it's some odd denticle from a cartilaginous fish of some variety OR alternatively it could just be an odd fish tooth (maybe pharyngeal?). It measures about 4 mm from base to tip and a little bit over 1 mm at its widest. Any input would be appreciated.






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39 minutes ago, Carl said:

The clear tip (called acrodin) is a dead give-away.

I wonder, does it concern sharks too? Or only ray-finned fishes? 

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23 hours ago, RuMert said:

I wonder, does it concern sharks too? Or only ray-finned fishes? 

As far as I know, the acrodin tip is exclusive to bony fish. But shark tooth denticles can certainly be clear, and the tip of Ischyrhiza teeth have that lighter color and gentle change in taper, but I don't think these are the same thing.

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On 12/19/2021 at 4:20 PM, Al Dente said:

It’s a bony fish tooth.


Yes, and I was thinking it could be a bowfin tooth but I haven't really read up on those.

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