Message 2004-10-0130: Fwd: Re: Fwd: Re: Fwd: Re: Fwd: PROPOSED ARTICLE X - autonym=

Sun, 19 Sep 2004 15:43:41 -0400

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Date: Sun, 19 Sep 2004 15:43:41 -0400
From: [unknown]
To: phylocode@ouvaxa.cats.ohiou.edu
Subject: Fwd: Re: Fwd: Re: Fwd: Re: Fwd: PROPOSED ARTICLE X - autonym=

>  > Louis Chinnery asked:
>>
>>  >There are competing names, e.g. the typified Magnoliophyta. Coul=
d the
>>  >existing typified names be used for one class of clade providing=
 that the
>>  >name is not currently being applied to a polyphyletic group?
>>
>>  Magnoliophyta could be defined as applying to the panstem, but th=
is
>>  would likely confuse people because Magnoliophyta and Angiosperma=
e
>>  are widely understood by botanists to be alternative names for th=
e
>>  same clade.  The same applies to other pairs of typified versus
>>  untypified names (e.g., Equisetophyta and Sphenophyta, Pinophyta =
and
>>  Coniferophyta, Lamiaceae and Labiatae).
>

Michael Keesey wrote:

>This isn't my domain, as such, but couldn't the typified names, name=
d after
>genera, be crowns, while the untypified names, which seem to all be=
=20
>named after
>characters, be apomorphy-based?
>

Sure this could be done, but I would not want to reserve all of the=
=20
untypified names for apomorphy-based clades for two reasons: 1) The=
=20
untypified name is, in some cases, the most widely used one (e.g.,=
=20
Angiospermae), and I support the premise that the most widely used=
=20
name should be assigned to the crown.  2) Some apomorphies that are=
=20
referred to in untypified names may be sufficiently difficult to=20
describe unambiguously that it would be better not to define a name=
=20
based on that apomorphy.  Furthermore, many people would prefer not=
=20
to use apomorphy-based definitions at all (though I do not share this=
=20
view); people who hold this view would not be able to define=20
untypified names if there were a convention to reserve these for=20
apomorphy-based clades.

Phil


--=20
Philip D. Cantino
Professor and Associate 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

  

Feedback to <mike@indexdata.com> is welcome!