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RE: Complete juvenile theropod unveiled in Germany

> Date: Fri, 14 Oct 2011 08:39:18 -0400
> From: martyniuk@gmail.com
> To: keenir@hotmail.com
> CC: saint_abyssal@yahoo.com; dinosaur@usc.edu
> Subject: Re: Complete juvenile theropod unveiled in Germany
> How would two animals in the same ecosystem occupy the same niche
> without one species quickly getting out-competed? If it's a symbiotic
> relationship, what's in it for _Nanotyrannus_?
 two boons came to mind:
1) it increases the size of the _Nanotyrannus_ packs, reducing the odds of 
anything (short of a T.rex pack)  being nuts enough to challenge them for food 
or territory, while making them able to take down even larger prey than they 
could otherwise.
2) _Nanotyrannus_ doesn't get genetically swamped because the T.rex are 
juveniles and thus not reproductively active.
> IMO this is one line of evidence that shows why the idea that
> _Nanotyrannus_, a "taxon" for all intents and purposes identical to
> the juvenile forms of a contemporary taxon, makes no sense as a real
> animal.
> Matt