Labels:text | bird OCR: EXCAVATION NOTES FOR TYRANNOSAURUS A DINOSAUR THAT LIVED 68-65 MYA (MILLION YEARS AGO) TYRANNOSAURUS : MISSING BONES Cervical Rib Scapula and and Vertebra Humerus Caudal Vertebra Tooth Hipbones Tibia Hand I Rib and Fibula Read the following description carefully to help you to find Tyrannosaurus' missing bones. Use the SCAN button to date the bones that you find buried in the three tunnels. Compare the date of the bones that you find with the date of the dinosaur bones that you are looking for. Tyrannosaurus was a bipedal (two-legged) carnivore (flesh-eater) that lived approximately 68-65 MYA (million years ago), during the Cretaceous Period. Its immense head was supported by a flexible neck with cervical (neck) ribs. The powerful jaws held rows of curved, saw-edged teeth. It had massive legs, but small, two-fingered hands on its arms that were surprisingly strong, but too short to bring food to the mouth. The arms were connected to the backbone by a long scapula (shoulder blade) with a disk-shaped coracoid (a short bone that helped to form the shoulder girdle). A huge ilium, ischium, and pubis formed the lizardlike hip joint. The stiffly held tail was supported by strong, long-spined caudal vertebrae (tailbones). DINOSAUR FACTS Dinosaurs lived on Earth within the following three time periods: TRIASSIC PERIOD 248-208 MYA (million years ago) JURASSIC PERIOD 208-144 MYA (million years ago) CRETACEOUS PERIOD 144-65 MYA (million years ago) Compare these typical dinosaur features with the bones that you find in the Dinosaur Excavation Site. Ornithischian ("bird-hipped") Saurischian ("lizard-hipped") Carnivore tooth Herbivore tooth (flesh-eater) (plant-eater)
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