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English: Tyrannosaurus rex. Superior (dorsal) view of skull and line diagram. Amer. Mus. No. 5027. Complete skull of Tyrannosaurus rex Osborn. Lateral view of skull and line diagram. The element shown in the upper posterior part of the first antorbital fenestra is the displaced ectopterygoid (transversum) of the opposite side. Tyrannosaurus rex ...
With a length of 12.1-12.2 meters, AMNH 5027 was discovered and excavated in 1908 by Barnum Brown in Montana, and described by Osborn in 1912 and 1916. At the time of discovery, a complete cervical (neck vertebrae) series for Tyrannosaurus was not previously known, so it was this specimen that brought the short, stocky tyrannosaur neck to light.
The inferred sclerotic ring for the Stan specimen is ~7 cm (2.8 in) in diameter with an internal aperture diameter of ~3.5 cm (1.4 in). Based on eye proportions in living reptiles, this implies a pupil diameter of about 2.5 cm (0.98 in), an iris diameter about that of the sclerotic ring, and an eyeball diameter of 11–12 cm (4.3–4.7 in).
Perhaps the largest-known Tyrannosaurus, a specimen named Sue at the Field Museum in Chicago, is 40-1/2 feet (12.3 meters) long. This individual lived about 67 million years ago, near the ...
The largest species was Tyrannosaurus rex, the most massive known terrestrial predator, which measured over 13 metres (43 ft) in length [2] and according to most modern estimates up to 8.87 metric tons (9.78 short tons) in weight. [3] [4] Tyrannosaurids were bipedal carnivores with massive skulls filled with large teeth. Despite their large ...
With the possible exception of Raptorex, [17] it is widely assumed that the Asian specimens are early growth stages of Tarbosaurus, [18] [19] [20] whereas the North American specimens are those of Tyrannosaurus. [21] [22] Skeletal diagrams showing holotype remains of Lythronax (A) and a Teratophoneus specimen (B). N–P show selected bones of ...
At any one time, around 20,000 T. rex struck fear into their Cretaceous Period contemporaries, the study suggested.
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