[Taxacom] burn out (was: classification of Class Rosopsida)
jcclark-lists at earthlink.net
Mon Apr 13 22:27:56 CDT 2009
On 2009-04-13 06:50, Richard Zander wrote:
> The ancestor of Aves is the closest paraphyletic taxon.
What's your metric for "closest"? For all your criticisms of the
weaknesses of parsimony analysis, this seems rather vague. Do you mean
number of generations, phenetic similarity, or what? I assume Aves had
to descend from it. Do you mean at the same rank (whatever that means
analytically), or what?
I can think of analytical approaches to grade taxa (I have mentioned
them, but no one seemed interested), and I don't find grade taxa
valuable. It seems to me that their proponents should either be able to
do as well or else explain why analysis is unnecessary and what
substitutes for it.
Curtis Clark http://www.csupomona.edu/~jcclark/
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