south-americans big theropods

[ville sinkkonen <ville_sinkkonen@artic.net>]

I was yesterday lookin for something to draw and i noticed that carnotaurus 
sarstrei ,giganoto carolini and abelisaurus comahuensis , they all had big 
inferior temporal fenestra.

I have heard that some animals had big air sack in the midle ear,what increase 
the sound what they actually heard. 
I's it possible that south american theropods had Big air sack too, and they 
try to listening their prey.

thanks 
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