1.4" Corythosaurus Fossil Rib Bone Judith River FM Cretaceous Dinosaur Montana COA Tyrannosaurus This ancient archosaur's anatomy reveals

This ancient archosaur's anatomy reveals a creature caught between worlds

These sloths could reach lengths exceeding 6 meters (20 feet) and weigh up to several tons

3 mm in larger specimens

Some types can glow blue or red under UV light

1.4" Corythosaurus Fossil Rib Bone Judith River FM Cretaceous Dinosaur Montana COA Tyrannosaurus This ancient archosaur's anatomy revealsLocation: Judith River Formation, Central Montana (Private Land Origin) Weight: 0. 9 Ounces Dimensions: 1. 4 Inches Long, 1. 4 Inches Wide, 0. 9 Inches Thick Comes with a Certificate of Authenticity. The item pictured is the one you will receive. Late Cretaceous, 83 million years old. Name: Corythosaurus Type: Herbivore Size: 9 meters in length. Corythosaurus is a genus of hadrosaurid, or duck billed, dinosaurs that lived during the Upper Cretaceous