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Abstract Detail

Systematics Section / ASPT

Cantino, P. D. [1].

Recent developments in the PhyloCode.

THE International Society of Phylogenetic Nomenclature (ISPN) was inaugurated in 2004 to oversee completion and implementation of the PhyloCode and the associated registration database. Several substantive changes were introduced in the most recent draft of the PhyloCode, which was posted on the Internet in June 2006. The most important changes concern choice of clade names, including: (1) a recommendation that the most widely used name for a crown clade be adopted for the crown even if the name is also sometimes used for a larger clade that extends below the crown; (2) the use of the prefix Pan- to designate the names of total clades (e.g., Pan-Spermatophyta would refer to the total clade of the crown clade Spermatophyta); (3) the use of the prefix Apo- to designate the names of clades stemming from the origin of an apomorphy that is referred to etymologically in a crown clade name (e.g., Apo-Spermatophyta for the clade stemming from the first species possessing seeds homologous with those in the crown clade Spermatophyta); (4) a mechanism to name a clade when the only preexisting name has already been adopted for a different clade because it has a different meaning under two rank-based codes (e.g., Prunella applies to different organisms under the ICZN vs. the ICBN); and (5) a recommendation that if there are several redundant rank-based names that might be established as the name of a crown clade (e.g., Equisetum, Equisetaceae, Equisetales, etc.), the genus name should be selected, leaving the higher ranked names available to establish for more inclusive clades. Probable future changes in the PhyloCode, reflecting the outcome of discussions at the 2006 meeting of the ISPN, concern the emending of phylogenetic definitions and the use of species names governed by the rank-based codes in the context of phylogenetic nomenclature.

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International Society for Phylogenetic Nomenclature

1 - Ohio University, Department of Environmental & Plant Biology, Porter Hall, Richland Avenue, Athens, Ohio, 45701-2979, USA


Presentation Type: Oral Paper:Papers for Sections
Session: 28-7
Location: 120/Ayres
Date: Monday, July 31st, 2006
Time: 5:00 PM
Abstract ID:38

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