5.1" Maiasaura Hadrosaur Dinosaur Rib Bone In Matrix Fossil Two Medicine FM MT COA Maiasaura They first appeared 25 million

They first appeared 25 million years before the earliest dinosaurs and long before the rise of birds and mammals

Fossil specimens serve as a window into prehistoric forests

fossil data indicate Onchopristis migrated into freshwater rivers to reproduce

These differences help scientists reconstruct the various ecological niches elephant birds occupied across ancient Madagascar

Geological Range: Ecphora gardnerae lived during the Miocene epoch (approximately 23 to 5

5.1" Maiasaura Hadrosaur Dinosaur Rib Bone In Matrix Fossil Two Medicine FM MT COA Maiasaura They first appeared 25 millionLocation: Two Medicine Formation, Montana (Private Land Origin) Weight: 8 Pounds 2. 9 Ounces (Matrix) Dimensions: 11. 5 Inches Long, 9. 5 Inches Wide, 2 Inches Thick (Matrix) Rib Dimensions: 5. 1 Inches Long,1. 3 Inches Wide, 9 Inches Thick Comes with a Certificate of Authenticity Comes with a Free Stand. The item pictured is the one you will receive. Cretaceous Age 83 70 Million Years Old. Name: Maiasaura Type: Herbivore Size: 9 meters in length.