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Date: Tue, 06 Feb 2001 09:53:17 -0600
From: "David M. Hillis" <dhillis@mail.utexas.edu>
To: PhyloCode@ouvaxa.cats.ohiou.edu
Subject: Re: apomorphy-based names
My apologies to Jonathan Wagner for misinterpreting his proposed recommendations as support in favor of apomorphy-based names. I agree with David Baum's arguments against such definitions (his arguments were better formulated than mine). Jonathan asked (below) for me to respond to his point d: > > d) And, please note: the third of my recommendations has nothing to do > with apomorphy based defintions. I would be interested to hear > what Dr. Hillis thinks of this one. The relevant recommendation is: Recommendation 11.8E: For logical consistency, in a stem- or node-based definition of a clade named for an apomorphy, internal specifiers should be chosen that unambiguously exhibit the nominal apomorphy. External specifiers should be chosen that unambiguously lack the apomorphy. I think this is a reasonable recommendation, although I'm not completely convinced that any specifier necessarily ever unambiguously exhibits (or lacks?) a particular apomorphy. David Hillis David M. Hillis Director, School of Biological Sciences Director's office: 512-232-3690 (FAX: 512-232-3699) Alfred W. Roark Centennial Professor Section of Integrative Biology University of Texas Austin, TX 78712 Research Office: 512-471-5792 Lab: 512-471-5661 FAX: 512-471-3878 E-mail: dhillis@mail.utexas.edu