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Re: New dope on ratites





One final post tonight:
     I think the living paleognaths are a holophyletic group, but whether
the ratites are holophyletic is questionable.
     I have a question about emus.  Is it true that emus have claws on
their wings (like the young of hoatzins).  I heard this in an e-mail from
someone who I don't very well, so don't know if it is true or not.
                 -------Ken
  ****************************************************

From: John Bois <jbois@umd5.umd.edu>
Reply-To: jbois@umd5.umd.edu
To: dinosaur@usc.edu
Subject: New dope on ratites
Date: Sat, 7 Jul 2001 12:48:45 -0400 (EDT)

As earlier noted (a big thanks), this website has the abstracts from NAPC
2001 June 26 - July 1 Berkeley, California
http://www.ucmp.berkeley.edu/napc/mainabs.html
This one might be of interest to ratite origins folk.
(5/23/01)
HETEROCHRONY SUGGESTS MULTIPLE FLIGHT LOSS EVENTS IN THE RATITES
MARSHALL, Cynthia L., Museum of the Rockies, Montana State University,
Bozeman, MT, USA
Studied wing development/loss in ratite embryos.  Finds very different
sequence in emus vs. ostriches.
Proposes that emus and clan were small birds that became big, and
that ostriches were large fliers.  No indication (from abstract,
anyway) of when this flight loss may have happened.  Did ostriches become
flightless in the Miocene?  Is molecular evidence of close relationship of
all ratites now to be mistrusted?  Dunno.


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