1.4" Holocystites Sp Crinoid In Matrix Fossil Silurian Age Osgood Shale Napoleon Indiana Saw Fish Tooth Extinction and Paleontological ImportanceTrilobites became

Extinction and Paleontological ImportanceTrilobites became extinct long before the age of dinosaurs

tyrannosaurs withstanding

indicating a wide geographic distribution during the Late Triassic

shallow epicontinental sea

1.4" Holocystites Sp Crinoid In Matrix Fossil Silurian Age Osgood Shale Napoleon Indiana Saw Fish Tooth Extinction and Paleontological ImportanceTrilobites becameLocation: Osgood Shale, Napoleon, Indiana Weight: 7. 1 Ounces Dimensions: 3. 4 Inches Tall, 2. 6 Inches Wide, 1. 1 Inches Thick (Matrix) Crinoid Dimensions are: 1. 4 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,