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Re: Basal Theropod Arm Position
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- Subject: Re: Basal Theropod Arm Position
- From: "Thomas R. Holtz, Jr." <firstname.lastname@example.org>
- Date: Sun, 18 Sep 2011 18:09:11 -0400 (EDT)
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My thoughts, with no real serious way to choose between them:
* Swept back, croc-like.
*Tucked as close in to the body as possible
On Sun, September 18, 2011 5:56 pm, Harris, Jerald wrote:
> A hypothetical question for y'all: in what position, d'you think, would a
> basal theropod, such as a coelophysoid, hold its arms while swimming?
> Given the absence of the bird-like wing-folding ability at all joints, and
> given the relatively limited flexibility at the shoulders and elbows
> described by Carpenter (2002), what's the alternative in order to prevent
> the arms from acting as baffles and maximize hydrodynamicity? Would they
> be kept swept backward, croc-like? Even if Carpenter's limits are off,
> which I might expect based on the more recent works that have shown that
> dinosaurs probably had great, heaping gobs o' cartilage at the joints,
> which likely enhanced mobility, I still don't see coelophysoids having
> anything close to a wing-like folding ability...
> Carpenter, K. 2002. Forelimb biomechanics of nonavian theropod dinosaurs
> in predation; pp. 59?76 in Gudo, M., Gutmann, M., and Scholz, J. (eds.),
> Concepts of Functional, Engineering and Constructional Morphology.
> Senckenbergiana Lethaea 82. E. Schweizerbart'sche Verlagsbuchhandlung,
> Dr. Jerry D. Harris
> Director of Paleontology
> Dixie State College
> Science Building
> 225 South 700 East
> St. George, UT 84770 USA
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> "Normal" is just a setting on the
> washing machine.
> -- Bernice Lewis
Thomas R. Holtz, Jr.
Email: email@example.com Phone: 301-405-4084
Office: Centreville 1216
Senior Lecturer, Vertebrate Paleontology
Dept. of Geology, University of Maryland
Faculty Director, Science & Global Change Program, College Park Scholars
Mailing Address: Thomas R. Holtz, Jr.
Department of Geology
Building 237, Room 1117
University of Maryland
College Park, MD 20742 USA