När fanns tyrannosaurus rex
The species Tyrannosaurus rex rex meaning "king" in Latin , often called T. It lived throughout what is now western North America , on what was then an island continent known as Laramidia.
Osborn used the Latin word rex , meaning "king", for the specific name. The specimen Sue, named after the discoverer, was the object of a legal battle over its ownership. The full binomial therefore translates to "tyrant lizard the king" or "King Tyrant Lizard", emphasizing the animal's size and presumed dominance over other species of the time.
Some experts have suggested the dinosaur was primarily a scavenger. Cope believed the fragments belonged to an "agathaumid" ceratopsid dinosaur, and named them Manospondylus gigas , meaning "giant porous vertebra", in reference to the numerous openings for blood vessels he found in the bone. As the archetypal theropod, Tyrannosaurus has been one of the best-known dinosaurs since the early 20th century and has been featured in film, advertising, postal stamps, and many other media.
In the early s, John Bell Hatcher collected postcranial elements in eastern Wyoming. The fossils were believed to be from the large species Ornithomimus grandis now Deinodon but are now considered T. In , Edward Drinker Cope found two vertebral fragments of a large dinosaur. Teeth from what is now documented as a Tyrannosaurus rex were found in by Arthur Lakes near Golden, Colorado. Several other genera of North American tyrannosaurids have also been synonymized with Tyrannosaurus.
Tyrannosaurus rex
The generic name is derived from the Greek words τύραννος tyrannos , meaning "tyrant" and σαῦρος sauros , meaning "lizard". The most complete specimen measures up to Although other theropods rivaled or exceeded Tyrannosaurus rex in size , it is still among the largest known land predators and is estimated to have exerted the strongest bite force among all terrestrial animals.
By far the largest carnivore in its environment, Tyrannosaurus rex was most likely an apex predator , preying upon hadrosaurs , juvenile armored herbivores like ceratopsians and ankylosaurs , and possibly sauropods. Osborn named the other specimen Dynamosaurus imperiosus in a paper in From the s through the end of the s, Barnum's discoveries remained the only specimens of Tyrannosaurus , as the Great Depression and wars kept many paleontologists out of the field.
Tyrannosaurus rex - Naturhistoriska riksmuseet
Its taxonomy is also controversial, as some scientists consider Tarbosaurus bataar from Asia to be a second Tyrannosaurus species, while others maintain Tarbosaurus is a separate genus. Most paleontologists today accept that Tyrannosaurus was both an active predator and a scavenger.
Specimens of Tyrannosaurus rex include some that are nearly complete skeletons. The abundance of fossil material has allowed significant research into many aspects of its biology, including its life history and biomechanics. Like other tyrannosaurids, Tyrannosaurus was a bipedal carnivore with a massive skull balanced by a long, heavy tail. It was the last known member of the tyrannosaurids and among the last non- avian dinosaurs to exist before the Cretaceous—Paleogene extinction event.
The question of whether Tyrannosaurus was an apex predator or a pure scavenger was among the longest debates in paleontology. The feeding habits, physiology , and potential speed of Tyrannosaurus rex are a few subjects of debate.
A study of this specimen's fossilized bones showed that Sue reached full size at age 19 and died at the age of 28, the longest estimated life of any tyrannosaur known. In , the litigation was settled in favor of Maurice Williams, the original land owner. Tyrannosaurus [nb 1] is a genus of large theropod dinosaur.
Fossils are found in a variety of rock formations dating to the Maastrichtian age of the Upper Cretaceous period , 68 to 66 million years ago. Tyrannosaurus had a much wider range than other tyrannosaurids. Relative to its large and powerful hind limbs, the forelimbs of Tyrannosaurus were short but unusually powerful for their size, and they had two clawed digits. In , Bucky Derflinger noticed a T.
The specimen, dubbed Bucky in honor of its discoverer, was a young adult, 3. Henry Fairfield Osborn recognized the similarity between Manospondylus gigas and T. Owing to the fragmentary nature of the Manospondylus vertebrae, Osborn did not synonymize the two genera, instead considering the older genus indeterminate. Brown found another partial skeleton in the Hell Creek Formation in Montana in , comprising approximately 34 fossilized bones.
Tyrannosaurus rex 3d
The s saw numerous discoveries, with nearly twice as many finds as in all previous years, including two of the most complete skeletons found to date: Sue and Stan. Soft tissue and proteins have been reported in at least one of these specimens. I have never seen anything like it from the Cretaceous ".