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Troodon Fact Sheet
Dinosaur/Paleontology Dictionary
NAME: Meaning - Troodon means "wounding tooth"
Pronounced - TROH-o-don
Named By - Joseph Leidy
When Named - 1856
DIET: Carnivore (meat-eater)
SIZE: Length - 6.5-11.5 ft (2-3.5 m) long
Height - 3 ft (1 m) tall at the hips
Weight - 110 pounds (50 kg)
WHEN IT LIVED: Late Cretaceous period, about 76-70 million years ago
WHERE IT LIVED: Fossils have been found in Canada (Alberta) and USA (Montana and Wyoming), North America.
FOSSILS: The first Troödon fossil was discovered by Ferdinand V. Hayden in 1855. Many teeth, 20 skeletons, and elongated eggs (some located in dirt nests) with embryos have been found.
  • Kingdom Animalia (animals)
  • Phylum Chordata (having a hollow nerve chord ending in a brain)
  • Class Archosauria (diapsids with socket-set teeth, etc.)
  • Order Saurischia - lizard-hipped dinosaurs
  • Suborder Theropoda - bipedal carnivores
  • Tetanura - advanced theropods with three fingers
  • Infraorder Coelurosauria - lightly-built fast-running predators with hollow bones and large brains
  • Family Troodontidae - the smartest dinosaurs with large eyes and grasping hands (eg. Troödon, Borogovia, Hepasteornis, Paronychodon, Saurornithoides, Sinornithoides, and Tochisaurus). They may have been omnivores.
  • Genus Troodon
  • Species T. formosus (type species named by Leidy, 1856)
Troodon may have been the smartest dinosaur, having the largest brain in proportion to its body weight (as smart as a modern bird). It was a fast-moving, light-weight predator that walked on two long legs. It had serrated teeth, long, slim jaws, and a stiff tail.

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