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Re: Longisquama feathers???



-----Original Message-----
From: Patrick Norton <ptnorton@email.msn.com>
To: jhecht@world.std.com <jhecht@world.std.com>; Dinosaur mailing list
<dinosaur@usc.edu>
Date: Saturday, June 24, 2000 1:00 PM
Subject: Re: Longisquama feathers???


>Jeff Hecht wrote:
>
>>Two independent analyses -- Jones et al and Hans-Dieter Sues -- say the
>enlongated scales (or whatever they are) were attached to muscles on the
>back. They were not for flapping flight. They may have been unfolded for
>gliding.<
>
>I'm not sure they would be very useful for gliding if they were attached to
>soft tissue at only one point.  It would be energetically expensive since
>the lifting force would have to pass to the animal's frame through tightly
>contracted muscles.  If these things were membranous an analogy might be
>made to the flying fish, which glides by holding its pectoral fins
>horizontally rigid after launching itself (I don't think the pectoral fins
>of flying fish have skeletal anchors).
>
>Interesting critter, though.  I'd like to see a photo of the whole fossil
as
>well.
>
>PTN


Actually,...I was wondering if they could possibly have been attached to a
patagium that isn`t well preserved. That would fit nicely with my ptero-bird
idea,.....(although I`m probably grasping at fern fronds here!). Is anything
of the Longisquama manus preserved at all?