DINOSAUR GRAVEYARD

 

Dinosaur Graveyard

TYRANNOSAURUS REX

Dinosaur Names

Dinosaur:  Tyrannosaurus Rex

Pronunciation:  tye-RAN-uh-SAWR-us

Translation:  tyrant lizard king

Location:  Western United States

Era:  Late Cretaceous Period, 68 million years ago

Length:  40 feet        Height:  20 Feet

Weight:  14,000 pounds

Diet:  Meat Eater

Fossils Found:  Nearly Complete Skeleton

 

Tyrannosaurus Tooth

Tyrannosaurus Foot

 

 

Tyrannosaurus rex, commonly abbreviated to T. rex, is one of the dinosaurs most often featured in popular culture around the world. It hails from what is now western North America. Some scientists consider Tarbosaurus bataar from Asia to represent a second species of Tyrannosaurus, while others maintain Tarbosaurus as a separate genus. Other species have also been described, but these were either concluded to be synonymous with Tyrannosaurus rex or removed from the genus.

 Like other tyrannosaurids, Tyrannosaurus was a bipedal carnivore with a massive skull balanced by a long, heavy tail. Relative to the large and powerful hindlimbs, Tyrannosaurus forelimbs were small and they retained only two digits. Although other theropods rivaled or exceeded T. rex in size, it was the largest known tyrannosaurid and one of the largest known land predators, measuring nearly 13 metres (43 feet) in length and up to 6.8 metric tons (7.5 short tons) in weight.

Fossils of T. rex have been found in North American rock formations dating to the last three million years of the Cretaceous Period at the end of the Maastrichtian stage, approximately 68.5 to 65.5 million years ago; it was among the last dinosaurs to exist prior to the Cretaceous–Tertiary extinction event. More than 30 specimens of T. rex have been identified, some of which are nearly complete skeletons. Some researchers have discovered soft tissue as well. The abundance of fossil material has allowed significant research into many aspects of its biology, including life history and biomechanics. The feeding habits, physiology and potential speed of T. rex are often subjects of debate.

Tyrannosaurus
Late Cretaceous
Fossil skeleton at theNational Museum of Natural History, Washington, D.C.
 
Museum of Natural History
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Sauropsida
Superorder: Dinosauria
Order: Saurischia
Suborder: Theropoda
Family:  Tyrannosauridae
Genus:  Tyrannosaurus
Osborn, 1905
Species: T. rex (type) Osborn, 1905

ACANTHOPHOLIS    ACROCANTHOSAURUS     TYRANNOSAURUS REX

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