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Dentary foramina



Quick question for anyone out there... When it comes to the foramina on the 
dentary of *Tyrannosaurus rex*, in relation to the teeth, is there only a 
lateral row with another one placed more ventrally? Or is there a medial row as 
well? I know that there is a lateral and more ventrally placed row for 
dromaeosaurs... but do they also have a bit of a medial row as well???

Thanks
Kris