[Taxacom] dinosaurs and wolves

Ken Kinman kinman at hotmail.com
Wed Oct 3 19:51:35 CDT 2012


Hi Kirk,
        What about  phylogenetic analyses and trees sensu Peter Ashlock which allow paraphyly (in addition to holophyly).  Would you regard them as less vague and therefore more informative and more of an accomplishment?    
                  -------------------Ken
--------------------------------------------------------------------------------------------
> Date: Wed, 3 Oct 2012 17:24:39 -0700
> From: kfitzhugh at nhm.org
> To: calabar.john at gmail.com
> CC: taxacom at mailman.nhm.ku.edu
> Subject: Re: [Taxacom] dinosaurs and wolves
> 
> I deny that our goal is to get 'trees.' Per the goal of science, we seek 
> causal understanding of the phenomena we encounter. Vague understanding, 
> sensu 'trees', isn't much of an accomplishment. ...K
> 
> On 10/3/2012 5:17 PM, John Grehan wrote:
> >
> > On Wed, Oct 3, 2012 at 4:00 PM, Kirk Fitzhugh <kfitzhugh at nhm.org 
> > <mailto:kfitzhugh at nhm.org>> wrote:
> >
> >     Hi Pierre,
> >
> >     Cladograms are nothing more than abstract devices that imply very
> >     vague
> >     causal accounts of character origin/fixation in ancestral populations
> >     and subsequent population splitting events. 
> >
> >
> >
> >  But perhaps no more 'vague' than any other tree building device?
> >
> > John Grehan
> 
> -- 
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> J. Kirk Fitzhugh, Ph.D.
> Curator of Polychaetes
> Invertebrate Zoology Section
> Research & Collections Branch
> Natural History Museum of Los Angeles County
> 900 Exposition Blvd
> Los Angeles CA 90007
> Phone: 213-763-3233
> FAX: 213-746-2999
> e-mail: kfitzhug at nhm.org
> http://www.nhm.org/site/research-collections/polychaetous-annelids
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 
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