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Date: Mon, 23 Apr 2001 09:11:00 -0400
From: Philip Cantino <cantino@ohiou.edu>
To: PhyloCode@ouvaxa.cats.ohiou.edu
Subject: Fwd: Vermes
Mike Keesey wrote: >This relates to a current discussion on the PhyloCode Mailing List. It >seems like it might be a good idea to advance a Recommendation for not >converting paraphyletic taxa when there is a pre-existing name for the >monophyletic group (e.g., don't expand _Amphibia_ when _Tetrapoda_ is >available). Maybe there should also be one against conversions that >drastically change membership. Not sure how this should be worded, though >-- tricky. If I interpret correctly what Mike is saying, I think both of his suggestions are already covered by Recommendation 10A. The first sentence of Rec. 10A ("Clade names should be selected in such a way as to minimize disruption of current usage") addresses Mike's concern about conversions that drastically change membership. The rest of 10A recommends the use of a preexisting name for the clade to be named rather than adopting (with expanded membership) a preexisting name of a paraphyletic group stemming from the same ancestor as the clade to be named. I think this is the same thing that Mike is suggesting. Phil Philip D. Cantino Professor and Chair Department of Environmental and Plant Biology Ohio University Athens, OH 45701-2979 U.S.A. Phone: (740) 593-1128; 593-1126 Fax: (740) 593-1130 e-mail: cantino@ohio.edu