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Re: Dino feathers=Ptero fur?
On Thu, 8 Feb 1996, T. Mike Keesey wrote:
> On Wed, 7 Feb 1996, Nicholas J. Pharris wrote:
> > > Does anyone know if any theropod skin impressions besides
> > > _Carnotaurus_, _Harpymimus_(?), and _Archaeopteryx_ are known? (besides
> > > modern birds, of course)
> > That was _Pelecanimimus_. There is supposed to be an impression from the
> > end of the tail of a tyrannosaur.
> Well, what does it show?
As I recall, bumpy skin.
> > > If _Carnotaurus_ didn't have feathers, does this necessarily mean that
> > > feathers must have developed after the ceratosaurs split from the
> > > tetanurines, or could it be that theropods (or dinosaur in general)
> > > beyond a
> > > certain size didn't need an insulating coat any more (as in elephants,
> > > rhinoes, etc.)
> > That's Greg Paul's preferred explanation, and I'm not disagreeing.
> Which one? I listed two explanations.
That feathers developed early and large dinosaurs lost them because they
didn't need insulation.
> Also, what non-theropod (or phytodinosaurian) skin impressions are
> known (besides the hadrosaur mummy)?
I wish I knew. I don't believe there have been any found from small
ornithischians, though, and that would be the place to look for feathers.
> -T. Mike Keesey
Pacific Lutheran University
Tacoma, WA 98447
"If you can't convince them, confuse them." -- Harry S Truman