1.6" Holocystites Sp Crinoid In Matrix Fossil Silurian Age Osgood Shale Napoleon Indiana Cedrelospermum This hard outer shell offered

This hard outer shell offered protection from predators and environmental stress while also allowing their remains to be exceptionally well preserved as fossils

First Appearance: ~521 million years ago

including healed punctures and bite marks

and sensory organs such as antennae

1.6" Holocystites Sp Crinoid In Matrix Fossil Silurian Age Osgood Shale Napoleon Indiana Cedrelospermum This hard outer shell offeredLocation: Osgood Shale, Napoleon, Indiana Weight: 2. 1 Ounces Dimensions: 2. 5 Inches Tall, 1. 2 Inches Wide, 0. 9 Inches Thick (Matrix) Crinoid Dimensions are: 1. 6 Inches Tall, 0. 8 Inches Wide The Item Pictured is the one you will receive. Holocystites Sp Silurian in age (420 million years old) Holocystites is an extinct genus of echinoderms belonging to the class Cystoidea and sub phylum Blastozoa. These organisms thrived during the Paleozoic Era,