This crinoid calyx fossil is not identified. It was found in southern Indiana and is from the Mississippian Period. For reference, the Coc...

Phanocrinus parvaramus crinoid calyx fossil found in southern Indiana. This creature lived in the Mississippian Period. Indiana, USA sour...

From the Age of Crinoids or the Mississippian Period, this southern Indiana fossil is thought to be a Culmicrinus elegans (Wachsmuth ...