Pachycephalosaurus

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Pachycephalosaurus
Front Back
Monsters of the Past
Previous	Deinocheirus
Next	Suchomimus
Card	45
Creature Features
Species	Pachycephalosaurus wyomingensis
Size	Length up to 26 ft.; Height up to 20 ft.; Weight up to 3 tons
Where?	Fossils have been found in the northern U.S. and Canada
Food	Plants, maybe small animals
Sound off	PACK-ee-sef-a-low-SORE-us
Did You Know?
Some scientists think this dinosaur gave birth to live young because it had extra bones near the base of its tail that widened its hips.

Pachycephalosaurus was a plant-eating dinosaur, but also was well built for battle. This creature had a crown of solid bone that was surrounded by spikes on both sides of its head. Head-butting brawls broke out between rival males in a herd; when danger was near, this dinosaur could deliver a lethal blow to predators but probably preferred to run.

Fresh Salad: This dinosaur had sharp, serrated teeth in its cheeks that shredded plants into an easy-to-swallow pulp. Small, spiky teeth in the front of its mouth stripped leaves from branches and crunched up tough seeds.

Spiked: Pachycephalosaurus had small, bony bumps on its skull. These bumps grew into long spikes on the back of the creature's head, which protected it from the biting jaws of enemies.

A Real Bonehead

Pachycephalosaurus' skull (left) was topped with a 10-inch thick dome made of solid bone. Many experts think this dinosaur used its head as a battering ram against others in a herd to establish dominance, either slamming into the side of a rival or crashing in head-on collisions with them. The bones in pachycephalosaurus' neck locked together when the dinosaur lowered its head and helped absorb the impact.

Smell of Fear: Instead of using its domed skull against large predators such as T-rex, pachycepahlosaurus relied on its speed to outrun danger. A keen sense of smell allowed this dino to detect enemies and take off before they got too close.

Old Timber: This creature walked on two legs most of the time, but probably went down on all fours when eating so it could feed on low-growing plants.

Timeline

Pachycephalosaurus lived 70 to 65 million years ago, during the late Cretaceous Period.

Trading Card

Pachycephalosaurus A 10-inch thick bony crown allowed this prehistoric battering ram to smash into other dinosaurs at full speed. Say What? This creature has been nicknamed a "bone-headed dinosaur." Powers +1 Defense against Monsters of the Past Stats Life 140 Attack 5 Defense 7

Trivia

• In the 'Smell of Fear' section, pachycephalosaurus is spelled 'Pachycepahlosaurus'.
• The pachycephalosaurus is featured on several Monster Mania cards:
  • It if first featured in Odd Creature Out on Monster Mania 28.
  • It is then featured in Fossil Finders on Monster Mania 42.
    • The skull used in the Fossil Finders game is the same one used on the back of the knowledge card.
• Modern paleontology now believes that Pachycephalosaurus was an omnivore, not just an herbivore.