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Dinosaur Jungle   >   Dinosaur Names   >   Tyrannosaurus rex
Dinosaur Jungle   >   Dinosaur Types   >   Tyrannosaurus rex


Tyrannosaurus rex

dinosaur picture Tyrannosaurus rex

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Scientific Classification
  Kingdom Animalia
  Phylum Chordata
  Class Sauropsida
  Superorder Dinosauria
  Order Saurischia
  Suborder Theropoda
  (unranked) Coelurosauria
  Superfamily Tyrannosauroidea
  Family Tyrannosauridae
  Genus Tyrannosaurus
  Species Tyrannosaurus rex
Tyrannosaurus rex was a large Theropod dinosaur. The animal was a carnivore (meat-eater), and lived in North America and Asia during late Cretaceous period, about 67 to 65 million years ago. It was one of the last dinosaurs, and probably went extinct during the the Cretaceous-Tertiary mass extinction.

An average Tyrannosaurus was about about 39 feet (11.9 meters) long, up to 20 feet (6.1 meters) tall, and weighed around 7 tons. Until the mid-1990s, it was generally thought that Tyrannosaurus was the largest land predator ever. Then, scientists discovered Giganotosaurus which lived was a 45 feet (13.8 meter) long carnivore that lived in Argentina about 100 million years ago. New research, first published in 2006, now suggests that Spinosaurus may have been even larger still: upto 51 feet (17 meters) long.

Since the 1960s, some scientists have argued that Tyrannosaurus was not a fearsome predator, but a slow-moving scavenger, that fed on carcasses killed by other carnivores. However, other scientists argue that the possibility of binocular vision (Tyrannosaurus rex has two forward facing eyes), and the relatively large areas of the brain associated with sight and smell, suggest it must have been an active predator.

Tyrannosaurus rex arm bones:
Tyrannosaurus rex arm bones

The name Tyrannosaurus rex was chosen by Henry Fairfield Osborn in 1905, and like most scientific names of animals is derived from Ancient Greek. "Tyrannosaurus" means "tyrant lizard", "rex" means "king", and hence in combination "Tyrannosaurus rex" means "tyrant king lizard".

Tyrannosaurus rex skull:
Tyrannosaurus rex skull


Tyrannosaurus rex Timeline:

Tyrannosaurus rex was a carnivore (meat-eater) that lived from 67 to 65 million years ago

Tyrannosaurus rex was a carnivore (meat-eater) that lived from 67 to 65 million years ago

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Tyrannosaurus rex Facts

Here is a summary of some of the key facts about Tyrannosaurus rex:
  1. Tyrannosaurus rex was a species of dinosaur.

  2. "Tyrannosaurus rex" means "tyrant lizard king". This name was chosen by Henry Fairfield Osborn in 1905.

  3. Tyrannosaurus rex was a member of the Saurischia ("lizard-hipped") order of dinosaurs. What this means, is that although Tyrannosaurus rex was not closely related to lizards, it did have similarly shaped pelvic bones.

  4. Tyrannosaurus rex was a Theropod - a member of a group of related bipedal dinosaurs that included the ancestors of birds (although Tyrannosaurus rex was not itself an ancestor of birds).

  5. Tyrannosaurus rex lived between about 67 million years ago and 65 million years ago, during the late Cretaceous period.

  6. Tyrannosaurus rex was one of the dinosaurs which died out during the Cretaceous-Tertiary mass extinction at the end of the Mesozoic Era.

  7. Tyrannosaurus rex lived in North America and Asia.

  8. Tyrannosaurus rex was a carnivore (meat-eater).

  9. Some scientists think that Tyrannosaurus rex was probably a scavenger, but others think it was an active predator.

  10. Tyrannosaurus rex was about 39 feet (11.9 meters) long, and about 20 feet (6.1 meters) tall.

  11. Tyrannosaurus rex weighed about 7 tons.

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