Potential Jawbone Fragment found in North Texas creek

[Styles]

Found this specimen in Post Oak Creek in North Texas.  For those unfamiliar it cuts through Cretaceous era deposits.  Appears to me to be a very worn jawbone fragment.  Strange to me though how the "teeth" appear to be clustered as opposed to having a linear orientation.  Mosasaur and Plesiosaur teeth and jawbones have been found in this area, but not sure if this looks like either.  Any suggestions?

 

 

[BobWill]

Nice find. I don't know what could have had staggered teeth like that. Maybe it is either pathological or got distorted in preservation. BTW, the Cretaceous is a period not an era. It was in the Mesozoic Era. I hope someone can identify it so we'll both know

[bone2stone]

A little bizarre, but have you given it any consideration that it may be crustacean?

Still has that toothy look though.

Jess B.

[Plax]

pet wood with partial phosphatized teredos preserved? Also initially thought it could be a pycnodontid jaw section but poorly preserved something like parabula casei. My initial guess is more likely and keep in mind that I'm guessing.

[Styles]

47 minutes ago, Plax said:

pet wood with partial phosphatized teredos preserved? Also initially thought it could be a pycnodontid jaw section but poorly preserved something like parabula casei. My initial guess is more likely and keep in mind that I'm guessing.

I'm liking the petrified wood idea - definitely feels that way, and would explain the wonky position of the tooth-like structures if it's actually teredos or something or the sort.

6 hours ago, bone2stone said:

A little bizarre, but have you given it any consideration that it may be crustacean?

Still has that toothy look though.

Jess B.

Thanks for the suggestion - in that case the "bone" would actually be the matrix? Definitely possible

 

10 hours ago, BobWill said:

Nice find. I don't know what could have had staggered teeth like that. Maybe it is either pathological or got distorted in preservation. BTW, the Cretaceous is a period not an era. It was in the Mesozoic Era. I hope someone can identify it so we'll both know

Thanks for the input and correction! Still learning, so any new information is good.

[sixgill pete]

I am not an expert by any means, however I do not see "jawbone" in this. I think Plax may be onto something with his guess of pet wood.