[Taxacom] Paraphyletic tagging

Kenneth Kinman kinman at hotmail.com
Fri Oct 3 09:22:28 CDT 2014


Hi Stephen,
       I would rather phrase it: "Amniotes lacking the synapomorphies of Mammalia and Aves".  Hair and feathers would not be the best synapomorphies to pick as they evolved too gradually (even baby Tyrannosaurus rex may have had feathers).  For Mammalia, the best synapomorphy so far discovered seems to be when the three ear bones decoupled from the mandible.    
          --------------------Ken
-----------------------------------------------------------------------------------------
> Date: Thu, 2 Oct 2014 22:19:07 -0700
> From: stephen_thorpe at yahoo.co.nz
> To: Taxacom at mailman.nhm.ku.edu; lists at curtisclark.org
> Subject: Re: [Taxacom] Paraphyletic tagging
> 
> Amniotes without hair or feathers!
> 
> --------------------------------------------
> On Fri, 3/10/14, Curtis Clark <lists at curtisclark.org> wrote:
> 
>  Subject: Re: [Taxacom] Paraphyletic tagging
>  To: "Taxacom at mailman.nhm.ku.edu" <Taxacom at mailman.nhm.ku.edu>
>  Received: Friday, 3 October, 2014, 4:46 PM
>  
>  On 2014-10-02 5:05 PM,
>  Kenneth Kinman wrote:
>  > P.S.  Thus we can say
>  that birds are dinosaur descendants (not "birds
>  > are dinosaurs").  And we can
>  continue saying that dinosaurs went
>  >
>  extinct at the end of the Cretaceous or that the asteroid
>  killed off
>  > the dinosaurs
>  
>  What is a diagnostic
>  plesiomorphy of a paraphyletic Reptilia?
>  
>  -- 
>  Curtis Clark        http://www.csupomona.edu/~jcclark
>  Biological Sciences               
>     +1 909 869 4140
>  Cal Poly
>  Pomona, Pomona CA 91768
>  
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