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In 2001, William Abler observed that Albertosaurus tooth serrations resemble a crack in the tooth ending in a round void called an ampulla. [39] Tyrannosaurid teeth were used as holdfasts for pulling flesh off a body, so when a tyrannosaur pulled back on a piece of meat, the tension could cause a purely crack-like serration to spread through ...
In 1876 Cope created an Aublysodon lateralis, based on specimen AMNH 3956, [13] [14] a tooth of a juvenile tyrannosaur which has been synonymized with Deinodon horridus. [15] In 1892 Marsh named two more species: Aublysodon amplus and Aublysodon cristatus , respectively based on teeth YPM 296 and YPM 297; the latter has also been placed in the ...
Tyrannosaurid bones with tooth marks represent about 2% of known fossils with preserved tooth marks. [124] Tyrannosaurid teeth were used as holdfasts for pulling meat off a body, rather than knife-like cutting functions. [125] Tooth wear patterns hint that complex head shaking behaviors may have been involved in tyrannosaur feeding. [125]
Following the sale of "Sue," another Tyrannosaurus rex skeleton was, the specimen was put up for auction on eBay in 2000 under the name of "Z-rex", with an asking price of over US$8 million. It failed to sell online but was purchased for an undisclosed price in 2001 by British millionaire Graham Ferguson Lacey, who renamed the skeleton "Samson ...
He called this group Tyrannoraptora (which in the absence of papers that recover a Tyrannosaur-maniraptoran clade), is a clade which contains most Coelurosaurs. [37] A 2007 analysis found the family Coeluridae , including the Late Jurassic North American genera Coelurus and Tanycolagreus , to be the sister group of Tyrannosauroidea.
Bistahieversor is a genus of derived tyrannosaur often classified in the subfamily Tyrannosaurinae. Different datasets have recovered varying placements for it within Eutyrannosauria . In 2020, Voris et al. recovered Bistahieversor as a basal member of Eutyrannosauria , rather than a tyrannosaurine , diverging later than Dryptosaurus and ...
Engraved on the tooth is a picture of the ship Francis, which artist Fred Myrick served on during the early 1800s. Now, sperm whales are protected under the Marine Mammal Protection Act. So, in ...
Extraneous tooth cusps are documented in Tyrannosaurus. [28] 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]