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Re: T rex walking speed WAS: Re: Addendum to Trex vision as support for scavenging...

Phil Bigelow (bigelowp@juno.com) wrote:

<The presence of a head crest would also preclude the tyrannosauroid _Guanlong_
from scavenging.  If a crest/no-crest is a criterion, then I don't buy it. 
_Guanlong_ probably enjoyed sticking its snout deep inside carcasses. 
_Guanlong_, _Dilophosaurus_, _Ornitholestes_, and other crested meat eaters
probably did just fine at scavenging.  They just had to improvise a bit.  Step
#1:  Turn head to the side. Step #2: Stick head in cavity of torso.  Step #3:
Start eating.  Step #4: When removing your head from cavity, make sure your
head is turned to the side.>

  Well, a crest may be prohibitive in the diameter of the object being used as
a crevice probe.

  However, on another note, *Ornitholestes* probably didn't have a crest. The
original indicator of one (Paul, 1988, _Predatory Dinosaurs of the World_)
turns out to be a broken piece of nasal deflected upward that _suggested_ a
crest, but was not in fact one (Carpenter et al., 2005, _The Carnivorous
Dinosaurs_ (Indiana University Press): 49-71).


Jaime A. Headden

"Innocent, unbiased observation is a myth." --- P.B. Medawar (1969)

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