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Re: Sauropod Self Defense



Have any estimates been made of how long a sauropod could hold it's head in the 
proposed vertical posture?

Don

----- Original Message ----
From: "GSP1954@aol.com" <GSP1954@aol.com>
To: dinosaur@usc.edu
Sent: Monday, November 19, 2007 3:21:50 PM
Subject: RE: Sauropod Self Defense


The appropriate titanosaur for an encounter with Tyrannosaurus is 
Alamosaurus. 

Except for the short necked dicraeosaurs and maybe short necked
 Nigersaurus, 
all known sauroopods could elevate the head well above shoulder level.
 Most 
sauropods could easily lift the necks to vertical, or beyond in many
 longer 
necked forms, by dorso-flexing each neck vertebrae by only 10 degrees
 or so, the 
amount preserved in the fused pair of Camarsaurus cervo-dorsals. In any
 case 
neutral neck posture in long necked animals living or extinct is
 largely useless 
in that it is basically impossible to reliably determine unless the 
intervertebral cartilage is present, because it says nothing about the
 maximum range on 
vertical motion, and because animals often feed with the neck well out
 of its 
neutral posture. 

Attempts to refute the ability of the tail heavy sauropods to rear up
 are 
rather silly in that any analysis would show that front heavy, tailless
 elephants 
lack any adaptations for rearing. Yet they do so in the wild to feed. 

As for the business about using inner ear orientation to determine head
 
posture don't get me started, at least yet,

GSPaul<BR><BR><BR>**************************************<BR> See what's
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