Message 2004-10-0165: Fwd: Homonyms Between Preexisting Codes

Tue, 28 Sep 2004 14:04:32 -0400

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Date: Tue, 28 Sep 2004 14:04:32 -0400
From: [unknown]
To: phylocode@ouvaxa.cats.ohiou.edu
Subject: Fwd: Homonyms Between Preexisting Codes


T. Michael Keesey wrote:

>It seems to me that Rule 11.8 is ambiguous when it comes to homonymi=
c taxa
>belonging to different preexisting codes (e.g., ICZN and ICBN).
>
>(emphasis added)
>"11.8. In the interest of consistency with the preexisting codes, IT=
 WOULD =3D
BE
>DESIRABLE for a clade whose name is converted from a genus name unde=
r a
>preexisting code, or is derived from the stem of a genus name, TO IN=
CLUDE T=3D
HE
>TYPE OF THE GENUS NAME. Therefore, when a clade name is converted fr=
om a
>preexisting genus name or is a new or converted=3D20
>name derived from the stem of a
>genus name, the definition of the clade name must use the type speci=
es of t=3D
hat
>genus name at the time of establishment as an internal specifier."
>
>In the case of homonymic taxa, it is not clear which type species sh=
ould be
>included. For example, in converting _Ficus_, should the required in=
ternal
>specifier be the type of _Ficus_ Linnaeus 1753 [ICBN] (_Ficus carica=
_ Linna=3D
eus
>1753; common fig tree) or of _Ficus_ R=3D96ding 1798=3D20
>[ICZN] (_Murex ficus_ Linnaeus
>1758; a snail)?
>
>I would think the older genus (_Ficus_ Linnaeus 1753) would be prefe=
rred, b=3D
ut
>this is not explicitly stated, as far as I can=3D20
>see (unless I missed something).

The problem you perceive disappears if you think=3D20
of Ficus L. 1753 and Ficus R. 1798 as different=3D20
names that happen to be spelled the same way,=3D20
rather than the same name.  This is consistent=3D20
with the definition of homonym in the PhyloCode=3D20
glossary.  Which type you use as an internal=3D20
specifier depends on which name you are=3D20
converting.  If you are converting Ficus L. 1753=3D20
as the name of a clade of plants, you would use=3D20
the type specimen of that name as an internal=3D20
specifier.  If you are converting Ficus R. 1798=3D20
as the name of a clade of snails, you would use=3D20
its type as an internal specifier.

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
=3D46ax: (740) 593-1130
e-mail: cantino@ohio.edu

  

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