Re: new dinosaurs and 16 Foot Man Eating Croc Caught In Uganda

[Tim Donovan <uwrk2@yahoo.com>]

--- David Marjanovic <david.marjanovic@gmx.at> wrote:

> > I'd expect the more advanced types
> > to supplant the basal ones, just like in the west.
> 
> Why do you think they had the same niche?


  Dryptosaurus was fairly large, maybe 7m, and I
assume hadrosaurs were the principal prey for any top
predator in the east. There apparently were no large
ceratopsids or sauropods. 




> *Dryptosaurus* retained an 
> extra-large thumb claw. It clearly did something
> that tyrannosaurids didn't 
> do.


  Maybe it relied on its manual claws to catch and
kill hadrosaurs whereas tyrannosaurs relied on their
jaws.


> 
> That's why "advanced" tends to be a thinking
> mistake. 
> 
> 



                
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