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RE: Integument of Tyrannosaurus and other questions
> Date: Thu, 21 Jun 2001 10:55:02 CDT
> From: Demetrios M Vital <firstname.lastname@example.org>
> Dear all:
> I have three queries:
> One. HP Holtz and others mentioned from the Armour Symposium a while back
> that tyrannosaurs may have been truly naked skinned. How is this
> reconciled with the news of mosaic scales form a tyrannosaur tail?
I hope to answer that as part of my "what I did during summer break" work...
I'll be travelling to a couple of Canadian museums checking out reports of
tyrant skin impressions. However, I'll check with Phil Currie and/or Darren
Tanke to see if they have papers on the subject in the work: if so, I'll let
them publish first.
> Assuming the animal is naked skinned, how would there be keratinous growth
> on cranial rugosities, like the nasals? Would this look like a human's
> finger nails?
I do not see any reason why it would be any different in scale-less tyrants
than scaled ones. The nasal region would be covered by a mass of
(presumably knobby) keratin. Because I would imagine the material would be
thicker than finger- or toenails, I would expect it to be darker in
> Two. Who coined the phrase "abscence of evidence is not evidence os
> abscence"? Was it HP Holtz?
Wished it was, but it predates me. I think I first heard it in the 1980s.
It would be interesting to see if someone can track down the origin.
> I have used it often, and now friends in
> psychology and various other scholarly enterprises use the phrase often.
> Its spreading, and I don't think they realize it originated in
> (assuming it did). Did it originate here?
> [ FWIW, I'm pretty sure I saw it in talk.origins years before the
> dinosaur list was created, so no; it didn't originate here -- MPR ]
I have encountered it in several contexts: in UFO/paranormal/conspiracy
theory circles; in circles relating to the subject matter of talk.origins;
in classes on scientific methodology. I can't recall at the moment the
context in which I first encountered it. It might even come out of
criminology, for all I know...
Thomas R. Holtz, Jr.
Department of Geology Director, Earth, Life & Time Program
University of Maryland College Park Scholars
College Park, MD 20742
Phone: 301-405-4084 Email: email@example.com
Fax (Geol): 301-314-9661 Fax (CPS-ELT): 301-405-0796