Help me identify these bivalves!

[Fossilsupremacy]

Found some (what i presume are) bivalves on the same hunt i found my ironstone! I decided to post them separately cause i wanna be as active as possible without overcrowding anything. They’re a little over 2 centimeters, my estimate at least (i’m terrible at math and not familiar with the metric system so bare with me-) 

Edited April 30, 2023 by Fossilsupremacy

[Fossildude19]

Cropped, enlarged, and brightened:

 

 

 

 

[BobWill]

I expect you are probably right with bivalves but they are more likely to be Cretaceous fossils from material washed into more recent sediments. I  collect in the area since I live just to the north, in Cooke County and we see a lot of oysters that size but yours may be too worn for a solid ID. Maybe a view from the side will give us a hint. If you haven't joined the Dallas Paleontology Society yet this is the busiest time of the year for their field trips if you want some really good sites to visit. A canoe trip down Denton Creek and a visit to Fossil Ridge ranch are coming up soon. See dallaspaleo.org for information.

Edited April 30, 2023 by BobWill

[Fossilsupremacy]

5 hours ago, BobWill said:

I expect you are probably right with bivalves but they are more likely to be Cretaceous fossils from material washed into more recent sediments. I  collect in the area since I live just to the north, in Cooke County and we see a lot of oysters that size but yours may be too worn for a solid ID. Maybe a view from the side will give us a hint. If you haven't joined the Dallas Paleontology Society yet this is the busiest time of the year for their field trips if you want some really good sites to visit. A canoe trip down Denton Creek and a visit to Fossil Ridge ranch are coming up soon. See dallaspaleo.org for information.

First off, thank you for telling me about the dallas paleontology society! I’ll definitely check it out and maybe go on some field trips if my schedule works out! Also, here are some side view photos of the 2 bivalves i found.

[BobWill]

Thanks for the new pictures. Now I'm wondering if they could be brachiopods. There is a Waconella waconensis with a similar look.