13.2" Brittle Star Ophiura Sp Starfish Mortality Plate Fossil Ordovician Age COA & Stand Sand Dollar Poebrotherium was first named by

Poebrotherium was first named by scientist Joseph Leidy in 1848

Each stone tells a 375-million-year story—start your collection when conditions are ideal

As one of the most captivating examples of Green River flora

The upper jaw bones would flex outward as the lower jaw rose

with their five prehensile arms and the compact central body

13.2" Brittle Star Ophiura Sp Starfish Mortality Plate Fossil Ordovician Age COA & Stand Sand Dollar Poebrotherium was first named byLocation: Kataoua Formation, Blekus, Morocco Weight: 8 Pounds 9. 1 Ounces Dimension: 13. 2 Inches Long, 10. 5 Inches Wide, 1. 1 Inches Thick (Plate) Comes with a Certificate of Authenticity. Comes with a Free Stand. The item pictured is the one you will receive. Brittlestar Ophiura Sp This intriguing limestone slab was extracted from Middle Upper Ordovician (about 450 million years old) rocks in the Anti Atlas part of the Atlas Mountains of Morocco.