Macrocrinus mundulus Crinoid from the Edwardsville Formation, Crawfordsville, Indiana, USA.

Dates to the Carboniferous period (Lower Mississippian) - In the region of 350 million years old.

Matrix: 11 cm x 6.5 cm

Crinoid (if outstretched): 13.5 cm

Excellent detail & nice sized example of this crinoid.