[Taxacom] New synapomorphy for humans and orangutans
jgrehan at sciencebuff.org
Mon Jan 4 12:05:43 CST 2010
> -----Original Message-----
> From: taxacom-bounces at mailman.nhm.ku.edu [mailto:taxacom-
> bounces at mailman.nhm.ku.edu] On Behalf Of Richard Zander
> Well, synapomorphies are part of parsimony cluster analysis, which for
> past 30 years has wrongly used the idea that the only evolution is
> gradualistic evolution with accumulation of neutral traits,
I am aware that molecular clock methods assume gradualism, but I was not
aware that cladistic methods necessitate gradualism of neutral traits.
> e.g., 3 traits are more informative than two. What if the 3 traits are
> selected on as a package for some particular environment?
Yes - what if?
> I think this is common.
But who knows?
Then the two traits, if accumulated through drift, would be more
> telling of evolutionary relationships.
> The best model of evolution is the "natural key" to taxa that
> morphological and molecular cluster analyses when available. This
> into account both synapomorphies (weighted separately for each node)
And of course I would disagree that is necessarily so as per various
earlier postings and debates.
> Richard H. Zander
> Missouri Botanical Garden
> PO Box 299
> St. Louis, MO 63166 U.S.A.
> richard.zander at mobot.org
> From: taxacom-bounces at mailman.nhm.ku.edu on behalf of Kirk Fitzhugh
> Sent: Sat 1/2/2010 8:17 PM
> To: taxacom at mailman.nhm.ku.edu
> Subject: Re: [Taxacom] New synapomorphy for humans and orangutans
> Kinman wrote: "Declaring it a synapomorphy is at best premature."
> Entia non sunt multiplicanda praeter necessitatem. It's not advocated
> science for nothing.
> J. Kirk Fitzhugh, Ph.D.
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