trilobite cast?

[austinswamp]

Good evening, I found this along a creek bed near Austin, Texas and was curious what y'all think it might be. This creek has shark teeth, urchins, and mollusks throughout. Thanks

[Douvilleiceras]

Trilobites were wiped out in the end-Permian Extinction, so since this piece is from cretaceous sediments, it's unfortunately not a trilobite. Additionally, I'm not seeing diagnostic features that would suggest a trilobite, further ruling out that possibility.

[austinswamp]

52 minutes ago, Douvilleiceras said:

Trilobites were wiped out in the end-Permian Extinction, so since this piece is from cretaceous sediments, it's unfortunately not a trilobite. Additionally, I'm not seeing diagnostic features that would suggest a trilobite, further ruling out that possibility.

Good to know, thanks for that

[Micah]

It looks like a cross section of part of a crinoid stem to me. Although there are things that might suggest otherwise but can’t prove anything as far as I know. (Rounded instead of parallel sides and completely connected at top and bottom) this could indicate something else, but I think it’s just the way it’s bernn worn visible.

[Rockwood]

Obliquely sectioned crinoid stem segment would be my best guess also.

[TqB]

One more for crinoid.

[abyssunder]