Dryptosaurus (Greek for "tearing lizard"); pronounced DRIP-toe-SORE-us
Woodlands of North America
Late Cretaceous (75-70 million years ago)
Size and Weight:
About 20 feet long and one ton
Large size; relatively long arms
Tyrannosaurus Rex gets all the press, but the tyrannosaur Dryptosaurus was actually discovered before its more famous cousin, by the famous paleontologist Edward Drinker Cope in 1866 (Cope originally named the new genus Laelaps, and then Dryptosaurus after it turned out the first name had already been taken). Classification-wise, Dryptosaurus wasn't recognized as an early tyrannosaur until years later, when its similarity to Appalachiosaurus, another relatively primitive example of the breed, sealed the deal. Discovered in New Jersey, Dryptosaurus is the second-most-popular dinosaur to hail from the Garden State, after Hadrosaurus.