Flexicalymene from Mt. Orab

The Ordovician aged limestones around Cincinnati are chock full of fossils and one of the most sought after is the trilobite Flexicalymene. I have yet to be lucky enough to find one myself but here is a partially enrolled specimen that I recently bought at a fossil show.









The fossil comes from the Arnheim member of the Richmond Formation and was found at Mt. Orab, Ohio. The site the fossil was found at is regionally famous for how productive it is at producing trilobite fossils. It is on private property and only clubs are allowed in and that only occurs one a year or so.

Ilymatogyra arietina

Another oyster found in the Cretaceous sediments of Texas is this curled specimen. Below is what I believe is a Ilymatogyra arietina based on the book "A Field Guide to Fossils of Texas" by Charles Finsley, plate 58, photo 192.










This fossil comes from the Lower Cretaceous aged Grayson Fm., Denton County, Texas.

As a comparison, here are the three Texas oysters that I've detailed in the last few posts side by side. From left to right: Texigryphaea navia, Texigryphaea marcoui, Ilymatogyra arietina

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.

Texigryphaea marcoui

Oysters are a fascinating group of Pelcypods to collect as they have such diversity of shapes while remaining remarkably similar in composition. Texas has a nice group of oysters of the genera Texigryphaea. Below is what I believe is a Texigryphaea marcoui based on the book "A Field Guide to Fossils of Texas" by Charles Finsley, plate 56, photo 180.














This above fossil is from the Lower Cretaceous aged Comanche Peak fm., Bosque County, Texas.

Crab update

A little while ago, I posted about some fossil Crabs in nodules from Chile that I'd purchased. They need to be cleaned and have some prep work done on them but now they are finished. Thanks to Steve (crabfossilsteve) from The Fossil Forum for doing such a great job!

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After



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The last one is my favorite since the claws are intact. Steve had to get some of the claw from the opposite half of the nodule since they broke when it was split open.