2. Dinosaurs

Dinosaurs

Dinosaurs' fossilized bone skeletons in natural history museums: tyranosaurus rex, diplodicus, carnotaurus, archosaur, allosaurus, stegosaurus, ankylosaur, dorudon, comptosaurus, mamenchisaurus, dimetrodon, eryops, pteranodon, protostega, hydrosaur, duckbilled
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Dinosaurs, prehistoric animals: Allosaurus fragilis, from Colorado, is a large meat eating dinosaur of the Late Jurassic period, about 150 million years ago. National Museum of Natural History, Washington, DC, November 2006.
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Dinosaurs, prehistoric animals: Allosaurus fragilis, from Colorado, is a large meat eating dinosaur of the Late Jurassic period, about 150 million years ago. National Museum of Natural History, Washington, DC, November 2006.

Dinosaurprehistoricanimalallosaurusfragilismeatmeat eaterColoradoLate JurassicJurassicNational Museum of Natural HistoryWashingtonDCNovember 2006.138069355

  • Dinosaur skeleton: Tyrannosaurus Rex was king of the dinosaurs, a meat eating dinosaur 65 million years ago in the American West. National Museum of Natural History, Washington DC, November 2006.
  • Dinosaurs, prehistoric animals: Stegosaurus stenops lived 120 million years ago, Late Jurassic. 3 - 5 ton plant eating dinosaur lived throughout western North America. Used hornhy beak to crop low-growing plants. Morrison Formation, Albany County, Wyoming. National Museum of Natural History, Washington, DC, November 2006.
  • Dinosaurs, prehistoric animals: Allosaurus fragilis, from Colorado, is a large meat eating dinosaur of the Late Jurassic period, about 150 million years ago. National Museum of Natural History, Washington, DC, November 2006.
  • Dinosaur skeleton: Skeleton of tyrannosaurus rex, a huge meat eating dynosaur of the Cretaceous period that grew over 40 feet long and 20 feet tall, with large sharp teeth and claws. Main entrance hall, Museum of Nature and Science, Denver, Colorado 2005.
  • Dinosaur skeleton: Skeleton of tyrannosaurus rex, a huge meat eating dynosaur of the Cretaceous period that grew over 40 feet long and 20 feet tall, with large sharp teeth and claws. Main entrance hall, Museum of Nature and Science, Denver, Colorado 2005.
  • Dinosaur fossil skeletons: Two Jurassic dinosaurs: Allosaurus (standing) was flesh-eating lizard-hipped dinosaur collected east of Cleveland, Utah. Stegosaurus (lying) was vegetarian bird-hipped dinosaur collected at Dinosaur National Monument, Utah, displayed as it might have appeared partially buried in sediments. Exhibit Museum of Natural History, University of Michigan, Ann Arbor, February 2006.
  • Dinosaur fossil skeletons: Allosaurus (standing) was flesh-eating lizard-hipped dinosaur from Jurassic Period collected east of Cleveland, Utah. Exhibit Museum of Natural History, University of Michigan, Ann Arbor, February 2006.
  • Dinosaurs, prehistoric animals: Stegosaurus stenops lived 120 million years ago, Late Jurassic. 3 - 5 ton plant eating dinosaur lived throughout western North America. Used hornhy beak to crop low-growing plants. Morrison Formation, Albany County, Wyoming. National Museum of Natural History, Washington, DC, November 2006.
  • Dinosaur skeleton: Tyrannosaurus Rex was king of the dinosaurs, a meat eating dinosaur 65 million years ago in the American West. National Museum of Natural History, Washington DC, November 2006.
  • Dinosaur skeleton: Duck-billed dinosaur, Tsintaosaurus spinorhinus is member of hadrosaur family of plant-eaters. Late Cretaceous Period, 95-65 million years old, Wangshi Formation, Laiyang County, Shandong Province, China. Los Angeles County Museum of Natural History, Los Angeles, California, January 2006.
  • Dinosaur skeleton: Full scale 13 ft wingspan reconstruction of pterodactyl accompanies skeleton of same, hanging in two-story space in main exhibit area. Exhibit Museum of Natural History, University of Michigan, Ann Arbor, February 2006.
  • Dinosaur skeleton: An archosaur, postosuchus kirkpatrickii, was a large meat-eating reptile member of thecodont group of the late triassic period, 235-208 million years ago, before the dinosaurs. Postosuchus walked on all fours but could walk on its hind legs for short intervals. This is a composite skeleton, constructed from castings of bones from several museums. Los Angeles County Museum of Natural History, Los Angeles, California, January 2006.
  • Dinosaur skeleton: An archosaur, postosuchus kirkpatrickii, was a large meat-eating reptile member of the codont group of the late triassic period, 235-208 million years ago, before the dinosaurs. Postosuchus walked on all fours but could walk on its hind legs for short intervals. This is a composite skeleton, constructed from castings of bones from several museums. Los Angeles County Museum of Natural History, Los Angeles, California, January 2006.
  • Dinosaur skeleton: An archosaur, postosuchus kirkpatrickii, was a large meat-eating reptile member of thecodont group of the late triassic period, 235-208 million years ago, before the dinosaurs. Postosuchus walked on all fours but could walk on its hind legs for short intervals. This is a composite skeleton, constructed from castings of bones from several museums. Los Angeles County Museum of Natural History, Los Angeles, California, January 2006.
  • Dinosaur skeleton: Comptosaurus and Allosaurus shown in a fight. Comptosaurus, Iguanodont Dinosaur (on left) is Late Jurrasic, 120 Million years ago, Morrison Formation, near Cleveland, Utah. Allosaurus is carnivorous dinosaur of Late Jurassic to Early Cretaceous, 150 million years ago that lived in in North America, Africa, Australia. Los Angeles Museum of Natural History, January 2006.
  • Dinosaur skeleton: Comptosaurus and Allosaurus shown in a fight. Comptosaurus, Iguanodont Dinosaur (on left) is Late Jurrasic, 120 Million years ago, Morrison Formation, near Cleveland, Utah. Allosaurus is carnivorous dinosaur of Late Jurassic to Early Cretaceous, 150 million years ago that lived in in North America, Africa, Australia. Los Angeles Museum of Natural History, January 2006.
  • Dinosaur skeleton: Diplodocus tongus, a long-necked dinosaur of the late Jurassic Period, 150 million years ago, from the Morrison Formation, Uinta County, Utah. The diplodocus were sauropods, which were plant eaters and the largest land animals ever, thriving worldwide. Denver Museum of Nature and Science, December 2005.
  • Dinosaur skeleton: Mamenchisaurus, with its long neck in particular, takes up the entire length of a very long room with its full length skeleton. This plant eating saurapod grew to 65-85 ft long and lived in the Late Jurassic Period. It is the largest necked dinosaur, and its neck is balanced with a long tail with a small club on its end. It is believed to have lived in herds of up to 100. This particular skeleton is a cast of a fossil skeleton from China. Los Angeles County Museum of Natural History, Los Angeles, California, January 2006.
  • Dinosaur skeleton: Mamenchisaurus, with its long neck in particular, takes up the entire length of a very long room with its full length skeleton. This plant eating saurapod grew to 65-85 ft long and lived in the Late Jurassic Period. It is the largest necked dinosaur, and its neck is balanced with a long tail with a small club on its end. It is believed to have lived in herds of up to 100. This particular skeleton is a cast of a fossil skeleton from China. Los Angeles County Museum of Natural History, Los Angeles, California, January 2006.
  • Dinosaur/dinosaur genera: Dimetrodon attacking an Eryops, both living during the Permian period 245-280 million years ago, long before the dinosaurs evolved. Dimetrodon was a mammal-like reptile, an ancestor of mammals, about 11 feet long weighing 500+ pounds, with a large sale-like flap of skin along its back supported by long, bony spines. It had sharp teeth and clawed feet. The Eryops was a common, primitive amphibian living in swamps, a meat eater with stout body and very wide ribs. It was 5 feet long, a large land animal for its time. Museum of Nature and Science, Denver, Colorado 2005.
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