Re: Pterosaur wing membranes

[jrc <jrccea@bellsouth.net>]

comments inserted below.

----- Original Message ----- 
From: "Jaime A. Headden" <qilongia@yahoo.com>
To: <dinosaur@usc.edu>
Cc: <davidrpeters@earthlink.net>
Sent: Sunday, May 21, 2006 8:36 AM
Subject: Re: Pterosaur wing membranes


> David Peters (davidrpeters@earthlink.net) wrote:
>
> An extended
> uropatagium, if it existed, would also show a radial arrangement of any
> embedded fibres, if present, and parallel when relaxed.

No.  They would be subparallel, when either relaxed or stressed.  The 
intercalation is one of the reasons they wouldn't be quite parallel.  I 
would not expect any of the outboard fibres to be radial in either case, 
because that isn't how the stresses are aligned.
>  In addition, it is also likely that leg-based "fillets" are responsible 
> for
> the leg-based membranes in *Sordes*, just as much as a ankle-to-arm broad
> chord.

Why is it likely?