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Image: B-rex teeth

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Description: Tyrannosaurus (MOR 1125, “B-rex”) teeth from the lower jaw of this medium-sized skeleton illustrate the extreme range in overall tooth size within one individual. The black scale bar is 5cm long. Above: A smaller posterior tooth from position #14 from the front of the jaw. Below: A larger tooth from position #4 in the same jaw. This demonstrates why shed dinosaur teeth are not a reliable indicator of relative skeletal size and ontogenetic age.
Title: B-rex teeth
Credit: http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0016574
Author: John R. Horner, Mark B. Goodwin, Nathan Myhrvold
Usage Terms: Creative Commons Attribution 2.5
License: CC BY 2.5
License Link: http://creativecommons.org/licenses/by/2.5
Attribution Required?: Yes

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