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Re: Bird reduce their "heating bills" in cold climates
--- On Tue, 7/6/10, Tim Williams <firstname.lastname@example.org> wrote:
> From: Tim Williams <email@example.com>
> Subject: Re: Bird reduce their "heating bills" in cold climates
> To: firstname.lastname@example.org
> Cc: email@example.com
> Date: Tuesday, July 6, 2010, 12:00 AM
> Jura <firstname.lastname@example.org>
> > There are some good evo-devo reasons to assume that
> > transition scales to feathers was an all, or nothing
> kind of
> > affair (well, scales to filamentous stuff at least).
> I thought that there was good evo-devo evidence that this
> transition did not take place at all. Instead, work by
> Prum and Brush indicates that feathers are evolutionary
> novelties, and did *not* evolve from scales.
Yeah, there seems a bit of a divide on this. Prum and Brush insist that
feathers are complete novelties while Sawyer & Knapp argue for a common --
scaly -- foundation. Xu and Guo gave a great rundown of the current status of
Xu, Xing, and Guo, Yu. 2009. The Origin and Early Evolution of Feathers:
Insights from Recent Paleontological and Neontological Data. Vertebrata
Palasiatica. vol 10:311-329.