Oyster?

[Utera]

I am having so much trouble finding out what these are. I confident that they are some type of prehistoric oyster but I have yet to find out. Is there anyway some of you guys can help me?

IMG_3374.HEIC

[Utera]

IMG_3375.HEIC

[caldigger]

Please post your pictures directly to this thread. Your imaging file requires app to download. 

[Fossildude19]

Please post .jpg images, rather than .heic images. 

You can use a free online tool like THIS to convert your images.

 

Converted pics:

 

 

   

[Ludwigia]

Where did you find them? Stratigraphy?

[caldigger]

They look a bit like Texagryphea sp.

[Utera]

They are Texigraphea. Thank you for everyone's help. And next time, I will change the image format and post them directly into the forum.

[Utera]

They are Texigraphea, but I think the name has been changed. I usually go to fossilworks.com to see if it is the active name for the genus and I typed Texigraphea in and no name like that exists in their database. Could the name have been changed or something else? 

[DPS Ammonite]

The correct spelling is texagryphea and it is still a valid genus. For most species ID you need to know what formation that they came from. Where did you find them?

[Utera]

My friend gave them to me and he said he found them near Fort Hood, Texas.

Edited November 27, 2019 by Utera

[Creek - Don]

 Those are very common down there.  You can just pick them up from the ground because they are so numerous.  

[Utera]

That is what he said. He literally gave me like 20 different specimens of it!

[grandpa]

The Ft. Hood area exposes the Lower Cretaceous Comanche Series including both the Glen Rose fm. of the Trinity Group and the Walnut fm. of the Fredericksburg Group ( both Albian Stage).  The Texigryphaea mucronata (Gabb, 1869) are plentiful in Coryell Co., Ft. Hood, Walnut fm. exposures.

[Utera]

Thank you grandpa

Edited November 27, 2019 by Utera