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Samurai

Location is in Missouri

The area is dated to the Pennsylvanian 

Formation: Muncie Creek Shale

 

I was cracking Phosphatic concretions and this baby popped out! :D I was excited and thought I should share and ask what it is! I believe it is a  cartilaginous fish spine, but I  have little knowledge in such topics.

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Ps Information on good glue to glue together the cracked piece is welcomed!

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Darbi

@Samurai, I can see why you think it's a fish spine. I wonder if it's a hybodont shark spine, but I'm not that familiar to fossils in Missouri. It's a very interesting find, hopefully others will help you soon!

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Samurai

Thanks for the guess! I recently decided to re investigate this a little and I have two guesses, I think it could also be a metapterygial axis belonging to a species from the order Symmoriida or

 

I think it could also be from a species belonging to the order Iniopterygiformes, however this Specimen would be larger than average, and I could not find info if they exist in Missouri or not. I will note there has been a braincast of a small species from the Iniopterygiformes being found in Kansas

 

PS:

I don't think it is a spine anymore since it is lacking the signature spikes of spines, or the line patterns seen in some of the images I googled, and I also noticed that there is some tessellated calcified cartilage on the fossil which indicates it is most likely not a spine.

 

 

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MrBones

No idea what this is, but I know that paraloid b72 is a good adhesive/pretective coating for many fossils. You can have a look around on the forum to get some tips on how to use it. 

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Samurai
1 hour ago, MrBones said:

No idea what this is, but I know that paraloid b72 is a good adhesive/protective coating for many fossils. You can have a look around on the forum to get some tips on how to use it. 

Thank you! I have barely touched the fossil since, due to fearing it might degrade I will have to order some

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