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RE: More on sauropod necks



 

 

-----Original Message-----
From: owner-dinosaur@usc.edu [mailto:owner-dinosaur@usc.edu]On Behalf Of David Marjanovic
Sent: Monday, December 31, 2001 2:31 PM
To: The Dinosaur Mailing List
Subject: More on sauropod necks

 

Why is it so difficult to get one's own text in black when the answering to dark blue?

 

I don’t know. Now my reply is red!

 

nd providing the ventral bracing of a beam.<<

The italics change into Times New Roman? Cool.

Whats the paper?

As HP Stephan Pickering just wrote:

 

Andreas Christian & Wolf-Dieter Heinrich wolf-dieter.heinrich@rz.hu-berlin.de: The neck posture of Brachiosaurus brancai, Mitteilungen aus dem Museum für Naturkunde zu Berlin, Geowissenschaftenliche Reihe 1, 73 -- 80 (19 November 1998).

 

The other, that argues for horizontal necks, is

 

John Martin, Valérie Martin-Rolland & Eberhard Frey: Not cranes or masts, but beams: The biomechanics of sauropod necks, Oryctos 1, 113 -- 120, October 1998

 

Ok, I have both.

 

I've got both via swapping -- especially Mitt. Mus. Natkd. Berl., Geowiss. Reihe is difficult to get, and I can't probably get Oryctos either.

 

Sure you can. You can go to my web site, go to Dinosaur links, scroll down to Publications and then to Oryctos or go to Jerry Harris’s site. Both have links to Oryctos where you can order it.

 

     The following three hypothetical neck postures were analysed: In the first model, the neck was assumed to be fully stretched out in a horizontal plane with the head pointing forward (in the following refer[r]ed to as "horizontal neck posture"). In the second model, the neck was positioned as in the reconstruction by Janensch (1950b) with the middle fraction of the neck forming an angle of about 30° with the vertical ("mounted neck posture" [...]). In the third model, the same shape of the most cranial three quarters of the neck was used as in the reconstruction by Janensch (1950b) but the neck was rotated around its base [along with, in the figure, the first 3 dorsal vertebrae] so that the straight middle part of the neck is fully vertical ("vertical neck posture" [...])."

 

All of this is well and good, but we need to have the last cervicals and first dorsals to be sure, which we don’t.

 

I'll write later about the results, the post is really long enough, and I must go to bed. See... read you next year :-)

 

 

Tracy L. Ford

P. O. Box 1171

Poway Ca  92074