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T rex carinae
Many thanks to those who reponded to my question about carinae on T. rex
teeth. I also recall reading a paper a few years back--I think in the SVP
journal--on bifurcated serration carinae in tyrannosaurid teeth (carinae
that formed sort of an upside down "Y" on the tooth.) As I recall, a
significant percent of the tyrannosaurid teeth studied by the author
exhibited that characteristic.
It would be interesting to know what was going on with tyrannosaurid
carinae. If the location of carinae varied along the vertical axis of
tyrannosaurid teeth and they were regularly doing other odd things like
bifurcating, is it possible that carinae were simply subject to less
selection pressure in tyrannosaurids than in smaller theropods with more
blade-like teeth? It seems that serrations would be more useful on a
weapon shaped like a knife than one shaped like a large railroad spike.