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RE: Sauropod Self Defense

Ezequiel Vera wrote:

> I'm not sure, but if I'm right, Carcharodontosaurids and Spinosaurids where
> replaced by Abelisaurids as "big predators" (althought not so big) in South
> America during the late cretaceous...

_Megaraptor_, which is probably either a spinosauroid or a carcharodontosaurid, 
is of Late Cretaceous age.  So the abelisaurids didn't have South America to 



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