Fwd: Re: [TAXACOM] genetic vs morphological trace of phylogeny

[John Grehan]

In response to Curtis Clark,

  It just so happens that some of my views on molecules and cladistics are
in agreement on what some molecular people and some cladists also say, and
then they differ with others. As for cladistics, I've certainly had plenty
of time to tackle the subject and my views do correspond with the
'textbooks' (and the works of Rosa, Hennig, and Nelson) with respect to
morphology, so your contention does not make sense in this respect. The
only matter that is problematic is whether DNA sequence data can be used as
cladistic data or not. Some on this list say yes, some say no. I currently
lean to the latter.

When I got into panbiogeography I was dismissed as not knowing what I was
talking about because the panbiogeographic approach was 'refuted' by
everyone and it wasn't supported by the textbooks.

These things don't really matter in the long run. TAXACOM is a place o
explore ideas as much as anything.

john Grehan

At 08:54 PM 4/7/2004 -0700, Curtis Clark wrote:
>At 02:25 2004-04-07, John Grehan wrote:
>>>I guess I'm a bit dense as I cannot make sense of your morphological
>>>characters.
>
>John, a lot of us on the list keep our "mouths shut" about panbiogeography
>because we don't really know anything about it. I'm starting to wonder if
>you might not best do the same with cladistics. A lot of this stuff is
>basic information in textbooks, and has been around for twenty years or
>more. I could accept that you might not have time to tackle the subject
>(that's my current excuse for panbiogeography, especially now that I know
>that I won't be teaching the biogeography course), but it seems so central
>to your human/orangutan arguments that it seems you would want to get it
>right.
>
>
>--
>Curtis Clark                  http://www.csupomona.edu/~jcclark/
>Web Coordinator, Cal Poly Pomona                 +1 909 979 6371
>Professor, Biological Sciences                   +1 909 869 4062

Dr. John Grehan
Director of Science and Collections
Buffalo Museum of Science
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