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Re: Suspicions of Integument on Pelicanimimus After All



So far I've seen evidence (or good reason to believe) for feathery
integument in the
compsognathids(Sinosauropteryx),dromaeosaurs(Sinornithosaurus
"Dave"),troodontids(Microraptor seems to share features in common with this
group,as well as the dromaeosaurs),oviraptorsaurs(Caudipteryx and
Protarchaeopteryx as Mickey Mortimer pointed out to me),and now the
ornithomimids(Pelicanimimus).
It seems that small theropods were generally feathered,and larger ones
scaled.

I never thought that I would hear myself say that any dinosaur was
feathered,but I'm not so stubborn that I'll ignore any evidence against my
point of view.This may be old hat to most of you on the list,but I'm from
the old way of thinking on the subject.

Thanks,
John Bridgman
----- Original Message ----- 
From: "Jordan Mallon" <j_mallon@hotmail.com>
To: <dinosaur@usc.edu>
Sent: Sunday, November 30, 2003 9:48 PM
Subject: Re: Suspicions of Integument on Pelicanimimus After All


> >From: "TIMOTHY BRIDGEMAN" <timlee3005@earthlink.net>
>
> >The skin impressions on the anterior part of Pelicanimimus polyodon show
it
> >to be smooth,with neither feathery integument OR scales.Am I justified in
> >the thought that (due to lack of scales,where as all other impressions
that
> >didn't show feathers DID show scales) maybe any integument it may have
had
> >was simply not preserved in this particular specimen?
>
> Simply put: yes.  As Briggs et al. (1997) write: "The surface of the skin
is
> smooth and lacks any visible dermal structures (e.g. feathers, scales,
> hair)."  What IS preserved is essentially a mineralized body outline, with
> some detailing (e.g. skin folds around the throat) preserved within.  I'm
> inclined to think the throat dewlap/pouch was fairly smooth and
featureless,
> something like a pelican (and so were the descriptors, for that matter).
> Hope that helps,
>
> Jordan Mallon
>
> Undergraduate Student, Carleton University
> Vertebrate Paleontology & Paleoecology
>
> Paleoart website: http://www.geocities.com/paleoportfolio/
> AIM: jslice mallon
>
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