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New online paper in Cretaceous Research
Here is an interesting new online paper in Cretaceous Research
Bell, Currie & Lee (2012) Tyrannosaur feeding traces on Deinocheirus
(Theropoda:?Ornithomimosauria) remains from the Nemegt Formation (Late
Cretaceous), Mongolia. Cretaceous Research
Bite marks attributable to Tarbosaurus bataar are identified on fragments of
gastralia from the giant putative ornithomimosaur, Deinocheirus mirificus.
Hundreds of bone fragments collected from the holotype quarry of D. mirificus
by members of the Korea-Mongolia International Dinosaur Project at Altan Uul
III (Mongolia) were visually inspected for biomodification. Parallel striae and
gouges were identified on two gastralia, which are interpreted as bite marks.
Serration marks, interpreted from parallel striae, are broadly U-shaped and
measure 0.5 mm in diameter. A comparison of these marks with the denticles of
Nemegt theropods reveals the tyrannosaur, Tarbosaurus as the most likely
culprit. The identification of tyrannosaur bite marks on the bones of D.
mirificus sheds light on both the diet of Tarbosaurus and the taphonomy of the
only known specimen of Deinocheirus.
► Tarbosaurus bite marks are identified on gastralia of the enigmatic theropod
Deinocheirus. ► Evidence suggests bites are a result of feeding/scavenging
behaviour, not interspecific agonism. ► These findings are consistent with
opportunistic feeding style in tyrannosaurids. ► Feeding/scavenging was partly
responsible for disarticulation of the Deinocheirus skeleton.
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