Friday, March 11, 2011

Texigryphaea navia

Today, another fossil oyster from the Texigryphaea genus. Below is what I believe is a Texigryphaea navia based on the book "A Field Guide to Fossils of Texas" by Charles Finsley, plate 57, photo 182.

Note the more flattened profile in comparison to the Texigryphaea marcoui that I had in my last post. This fossil is from the Lower Cretaceous aged Grayson Fm., Tarrant County, Texas.

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