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Re: Anchiornis huxleyi
Are we sure its a Troodontid?
If its feathers were symmetrical and it was a troodont, then that means
asymmetry in feathers evolved twice, as Microraptor and birds had/have
Given its really early age, it seems to me this may be a basal Paraves.
Also, did it have an enlarged claw?
I seem to recall that Dromeosaurs and troodontids both shared this feature
(dromeosaurs with the enlargement being much greater).
Didn't archie have a slightly enlarged claw as well?
Would a at least slightly enlarged claw be basal to Dromeo+Troodon+birds?
If this didn't have one, would that make it even more basal?
I was thinking Asymetrical feathers would have evolved before the three
lineages split, given their presence in at least 2 of the lineages (the 3rd
being a sister taxa of one with asymmetrical feathers).
--- On Fri, 9/25/09, email@example.com <firstname.lastname@example.org> wrote:
> From: email@example.com <firstname.lastname@example.org>
> Subject: Re: Anchiornis huxleyi
> To: email@example.com
> Date: Friday, September 25, 2009, 1:29 PM
> Sheesh! What's with the over-vigorous
> removal of matrix near the limb
> bones? Doesn't it give preparators a Very Bad Feeling to
> chip away feather
> impressions? I've seen this on other spectacular fossils as
> > http://news.bbc.co.uk/1/hi/sci/tech/8273938.stm
> -- Donna Braginetz