Allosaurus is a genus of carnivorous theropod dinosaur that lived 155 to 150 million years ago during the late Jurassic period (Kimmeridgian to early Tithonian). The name "Allosaurus" means "different lizard" alluding to its unique concave vertebrae. It is derived from the Greek and σαῦρος/sauros ("lizard / generic reptile"). The first fossil remains that could definitively be ascribed to this genus were described in 1877 by paleontologist Othniel Charles Marsh. As one of the first well-known theropod dinosaurs, it has long attracted attention outside of paleontological circles. Indeed, it has been a top feature in several films and documentaries about prehistoric life.
|Range||North America and Europe|
Speed: 19 – 34 mph
Lived: 163.5 million years ago - 89.3 million years ago (Late Jurassic - Turonian)
Fossils: AMNH 680, Big Al Two, USNM 8367, Big Al, USNM 4734
Did you know: It measured about 8 meters (about 26 ft) in length.