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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