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Re: Longisquama feathers???

On Sat, 24 Jun 2000, Patrick Norton wrote:
> 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).

Which could still leave functions like displays (sexual or defensive).

This would be interesting. Most discussion seems to focus on flight, I
don't recall other possibilities for L. being discussed.

> [...]