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but only about a third larger than Hypacrosaurus in the largest individuals (twelve meters for a large individual Tyrannosaurus compared to nine meters for Hypacrosaurus)
they faced extinction in the dramatic Cretaceous-Tertiary mass die-off
approximately 72 to 66 million years ago
despite the limited fossil material available at the time
Tooth Dimensions: 1
24MM Brittle Star Petraster Starfish Fossil Ordovician Age Blekus Morocco COA Wooly Rhinoceross Tooth but only about a thirdLocation: Kataoua Formation, Blekus, Morocco Weight: 13. 9 Ounces Starfish Dimensions: 24MM Dimension: 5 Inches Long, 3. 5 Inches Wide, 0. 9 Inches Thick (Plate) Comes with a Certificate of Authenticity. The item pictured is the one you will receive. Brittlestar Petraster This remarkable limestone slab was sourced from Middle to Upper Ordovician strata, approximately 450 million years old, within the Anti Atlas region of Moroccos Atlas Mountains.
