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gturner333

Pennsylvanian fish tooth?

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gturner333

I have bulk sampled many times at the Lost Creek Reservoir in Jacksboro, TX, which is Pennsylvanian material. After dissolving a rock from the Jacksboro Limestone, I found what looks like a fish tooth that is 1.1mm long. In fact, it closely resembles some of the palaeoniscoid fish teeth that I have found in the Permian. Since it is the only one that I have ever found at Jacksboro, there is a chance that it could have somehow been transferred there. Or, although I try to thoroughly clean my screens after each use, I guess there is the chance of cross contamination. I have used those screens to sort through Permian material recently.

 

My question is, has anyone ever found a fish tooth at Jacksboro? If so, does it look like the attached picture? Thanks for any help.

fish tooth 1100um.jpg

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caldigger

Nice one. Hope you find some answers.

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Heteromorph

Nice tooth! Maybe @BobWill could help. 

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Bullsnake

For some of the fish teeth I've found, Hickory Creek shale in Kansas, I found this in Fruitbat's library.

There may be something more applicable to your formation there.

paleo.paper.096op.pdf

 

Incidentally, here is one of mine that looks similar to yours. @Carl might have some input, as well.

 

IMG_0031.thumb.jpg.6bef23836c934dc34054620bde1f4774.jpgIMG_0032.thumb.jpg.bae470f96a963169355a49ed16bb6993.jpg

 

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gturner333

So, Bullsnake, just to be sure, did you find the above in the Hickory Creek shale? It really does look like mine. 

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JimB88

The striations remind me of a Symmorium type cladodont shark, but would need the root (with the cusplets) to be sure.

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gturner333

Did cladodont shark teeth have an acrodin tip? These teeth have a clear acrodin tip, which I have been told are characteristic  of ray-finned fish. But there are some similarities with the cladodont cusps. 

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Bullsnake
11 hours ago, gturner333 said:

So, Bullsnake, just to be sure, did you find the above in the Hickory Creek shale? It really does look like mine. 

 

That's correct. Along with several other varieties and some that I surmise to be cladodont fragments.

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Carl

I'm with @gturner333 100%.

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gturner333

Carl, are you agreeing with my thinking that it is a palaeoniscoid fish tooth or that it does look like a cladodont tooth piece? Have you ever found any Pennsylvanian fish teeth? If so, where?

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Carl
39 minutes ago, gturner333 said:

Carl, are you agreeing with my thinking that it is a palaeoniscoid fish tooth or that it does look like a cladodont tooth piece? Have you ever found any Pennsylvanian fish teeth? If so, where?

Sorry. Agreeing that the acrodin tip gives us an actinopterygian and that there's a vague similarity to cladodonts. Definitely don't think it's a shark. The only Pennsylvanian teeth I've found were chondrichthyans at Wilson's Clay Pit.

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gturner333

ok, thanks to all for your input.

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