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Tyrannosaurus rex tooth found in healed hadrosaur bone



From: Ben Creisler
bcreisler@gmail.com

A new paper not yet mentioned on the DML:

Robert A. DePalma II, David A. Burnham, Larry D. Martin, Bruce M.
Rothschild, and Peter L. Larson (2013)
Physical evidence of predatory behavior in Tyrannosaurus rex.
Proceedings of the National Academy of Sciences (advance online publication)
 doi: 10.1073/pnas.1216534110
http://www.pnas.org/content/early/2013/07/10/1216534110.abstract


Feeding strategies of the large theropod, Tyrannosaurus rex, either as
a predator or a scavenger, have been a topic of debate previously
compromised by lack of definitive physical evidence. Tooth drag and
bone puncture marks have been documented on suggested prey items, but
are often difficult to attribute to a specific theropod. Further,
postmortem damage cannot be distinguished from intravital occurrences,
unless evidence of healing is present. Here we report definitive
evidence of predation by T. rex: a tooth crown embedded in a
hadrosaurid caudal centrum, surrounded by healed bone growth. This
indicates that the prey escaped and lived for some time after the
injury, providing direct evidence of predatory behavior by T. rex. The
two traumatically fused hadrosaur vertebrae partially enclosing a T.
rex tooth were discovered in the Hell Creek Formation of South Dakota.