Fossil shown appears to be some sort of species of Glyptocrinus or Glyptaster crinoid. Specimen was found in the Silurian Waldron Shale ...

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...