Pennsylvanian fish tooth?

[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.

[caldigger]

Nice one. Hope you find some answers.

[Heteromorph]

Nice tooth! Maybe @BobWill could help. 

[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.

 

 

[gturner333]

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

[JimB88]

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

[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. 

[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.

[Carl]

I'm with @gturner333 100%.

[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?

[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.

[gturner333]

ok, thanks to all for your input.