[Taxacom] Lynn's taxa

John Grehan jgrehan at sciencebuff.org
Fri Nov 11 11:04:20 CST 2011


Or they could be true biological species that can interbreed.
Interbreeding is only important if one decides that it is.

John Grehan

-----Original Message-----
From: taxacom-bounces at mailman.nhm.ku.edu
[mailto:taxacom-bounces at mailman.nhm.ku.edu] On Behalf Of Richard Jensen
Sent: Friday, November 11, 2011 11:12 AM
To: taxacom at mailman.nhm.ku.edu
Subject: Re: [Taxacom] Lynn's taxa

On the other hand, their ability to interbreed or not may be quite 
important.  They could be true biological species!

Dick J

On 11/11/2011 10:35 AM, John Grehan wrote:
> Their ability to interbreed or not may be neither here not there. They
would just be species that can interbreed.
>
> John Grehan
>
> -----Original Message-----
> From: taxacom-bounces at mailman.nhm.ku.edu
[mailto:taxacom-bounces at mailman.nhm.ku.edu] On Behalf Of Kenneth Kinman
> Sent: Friday, November 11, 2011 9:25 AM
> To: taxacom at mailman.nhm.ku.edu
> Subject: [Taxacom] Lynn's taxa (was: clade age)
>
> Hi Lynn,                
>           Sounds like a case of subspeciation, but not
> necessarily speciation.  Since they are morphologically distinct, one
> could certainly justify naming them (at least as subspecies).
>
>        But if the differences in morphology are caused by few genes
(as
> few as one), then chances are that such mutations would not have
> resulted in an inability to interbreed.  I just wonder if more
intensive
>
> sampling in upstream areas might reveal areas where some of these taxa
> actually still meet and interbreed (where the valleys are not as
deep).
>                    -----------Ken  
>
>                                   
> ----------------------------------------------
> Lynn Raw wrote:
>           The second question was not theoretical. It
> resulted from the geosynclinal uplift of a once single habitat
followed
> by the incision of deep river valleys that has resulted in 7
> morphologically distinct, dare I call them, taxa. DNA studies were
> unable to separate them, my guess is that this looked at a stable
> sequence in this group that did not change. Perhaps choosing another
> region could show some differences but I can see just how a tree /
> cladistic approach would not be able to deal with it.
>
>
>
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-- 
Richard J. Jensen, Professor
Department of Biology
Saint Mary's College
Notre Dame, IN 46556
Tel: 574-284-4674


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