Hello from central Texas

[Trailgetter]

Hi, I found a bunch of fossils today on our property. Mostly oysters but this one I've never seen. Any help is greatly appreciated. 

[Fossildude19]

Welcome to the Forum.  

What county is your property in?

Can we see a photo of the other side of this?

It looks like a valve to an oyster, but the interior side (showing) doesn't have any identifying details.

It may belong to something similar to Exogyra ponderosa.

Regards,

 

[erose]

Pretty sure that is the upper valve of an Exogyra as Tim suggests.  Would need to see the other side AND the lower valves you are finding to know what species it is. Along with E. ponderosa there are at another half dozen commonly found species of Exogyra to be found in Texas.

[Trailgetter]

Found in Del Valle, Travis county near McKinney Falls State Park. Thanks!

[BobWill]

Yes, very nice oyster. It looks a little different from the Exogyras I find farther north. I assume that's a left valve and the inside might clean up nicely but it's the outer surface that has me puzzled. Tim or erose could that have formed up against another shell or is that typical for some species I haven't seen? If that has left a trace of another shell this would be a good example of a form of preservation called bioimmuration.

[Trailgetter]

Found these today in the same spot. 

[Trailgetter]

 Coral?