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Most expensive fossil sold until the sale of Stan in 2020. [10] Barnum Tyrannosaurus rex: 20% of a skeleton Collected by Japeth Boyce in Wyoming, United States in 1995 Bonhams: May 16, 2004: Los Angeles $93,250 [c] $150,422 Reported to potentially be the same individual as the first T. rex specimen ever discovered, now at the Natural History ...
The debate about whether Tyrannosaurus was an active predator or a pure scavenger, however, is as old as the debate about its locomotion.Lambe (1917) described a good skeleton of Tyrannosaurus ' s close relative Gorgosaurus and concluded that it and therefore also Tyrannosaurus was a pure scavenger, because the Gorgosaurus teeth showed hardly any wear. [14]
The teeth of T. rex displayed marked heterodonty (differences in shape). [51] [52] The premaxillary teeth, four per side at the front of the upper jaw, were closely packed, D-shaped in cross-section, had reinforcing ridges on the rear surface, were incisiform (their tips were chisel-like blades) and curved backwards.
A new study suggests Tyrannosaurus rex had giant, full gums and lips that covered much of their teeth.
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 ...
Some teeth show evidence of bite marks by other Tyrannosaurus. [28] The Tyrannosaurus rex specimen AMNH 5027 has a deformity fusing the centra of the seventh and eighth back vertebrae. The centra of the tenth neck and first back vertebrae are fused in a similar fashion. [31] In 1923 Moodie reported a T. rex specimen as having spondylitis ...