[Taxacom] burn out (was: classification of Class Rosopsida)

Curtis Clark 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/
Director, I&IT Web Development                   +1 909 979 6371
University Web Coordinator, Cal Poly Pomona

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