The fossil shown here is an Mariacrinus carleyi crinoid calyx found in the Waldron Shale of Davidson County, Tennessee, USA. It was found...

This looks like a Peneroplis plantus foraminifera. It was found at Pago Beach on the island of Guam. Image is magnified 40 times under a ...

UPDATE: I am pretty sure my earlier identification is incorrect. I now think this might be an Elphidium aculeatum ( Polystomella aculeat...