Fossil plate was found in the Edwardsville Formation of Floyd County, Indiana, USA. The fossils date to the lower Carboniferous (Mississ...

This crinoid calyx fossil is called Macrocrinus mundulus (Hall). It dates to the Mississippian Period and was found Keokuk of Warsaw, Ill...

These images are quite interesting in that they show possible parasites or byrozoans on a crinoid stem fossil. These fossil was found in ...

This image is of an unidentified crinoid holdfast attached to larger crinoid stem fossil. It was found in the New Providence Formation (K...

This image is of an unidentified crinoid calyx fossil plate. It was found in the Keokuk Formation of Scott County Indiana USA. This creat...

This image is of a  Platycrinites hemisphericus crinoid calyx fossil plate. It was found in the Keokuk Formation of Scott County Indiana ...