[CPN] Fwd: Proposal to reorganize really just Note 9.3.1 this time

Cantino, Philip cantino at ohio.edu
Mon May 13 14:49:40 EDT 2013 

Dear CPN members,

Although I had hoped to be able to generate a new revision of the proposals related to Note 9.3.1 last week, it is not ready.  Kevin and I worked on it via email last week and came up with wording we are both comfortable with on some issues, but we haven't had time yet to consider all of the aspects of David M's proposed reorganization of that Note (and related matters in that message).  Unfortunately, I am leaving town on Wednesday for nine days and will not be dealing with CPN business during that period, so it is going to have to wait a few weeks.  I will do my best to get to it soon after I return, but realistically, I think it is likely to be late May or early June before we can send you a revised proposal.

Regards,
Phil


Begin forwarded message:

From: "Cantino, Philip" <cantino at ohio.edu<mailto:cantino at ohio.edu>>
Date: May 3, 2013 2:08:01 PM EDT
To: Committee on Phylogenetic Nomenclature <cpn at listserv.ohio.edu<mailto:cpn at listserv.ohio.edu>>
Subject: Fwd: [CPN] Proposal to reorganize really just Note 9.3.1 this time

Dear CPN members,

Quite a few changes were suggested on Wednesday, and it may take a while for Kevin and me to work through them by email and generate a new revision of the original set of proposals.  I hope to be able to send it to you by the middle of next week but it could be later.

Regards,
Phil


Begin forwarded message:

From: Michel Laurin <michel.laurin at upmc.fr<mailto:michel.laurin at upmc.fr>>
Date: May 1, 2013 8:20:20 PM EDT
To: "cpn at listserv.ohio.edu<mailto:cpn at listserv.ohio.edu>" <cpn at listserv.ohio.edu<mailto:cpn at listserv.ohio.edu>>
Subject: Re: [CPN] Proposal to reorganize really just Note 9.3.1 this time

Hi all,

    It is late, but I will be busy with something else tomorrow (technically, later today because it is 2:20AM), so I just want to add that after reading Kevin's and David's comments, with which I agree (at least at first glance), if the changes outlined by both are done, I think that I will feel comfortable voting for the amendment.

    Good night,

    Michel

On 02/05/13 02:10, David Marjanovic wrote:
The entire text of the version I propose follows. Because it is so different from the current wording, I have not marked additions and deletions, except where I propose to delete entire paragraphs.

=================================

Note 9.3.1. The definition of "clade" is "an ancestor (an organism, population, or species) and all of its descendants" (Art. 2.1). Building on this definition, clade names can be defined by pointing at such an ancestor, creating a phylogenetic definition. This can be done in different ways, such as the following:

 *   The ancestor can be mentioned directly in an ancestor-based definition: "A and all its descendants", where A is a specific organism, population, or species.
 *   Usually, however, the intended ancestor is not directly known. Thus, the ancestor can be indicated by its relation to two or more specifiers (Art. 11) that are mentioned directly:
    *   A minimum-clade definition [note the hyphen which makes clear that the clade, not the definition, is a minimum] may take the form [...]
    *   A maximum-clade definition may take the form [...]
    *   An apomorphy-based definition may take the form [...]
 *   The ancestor can be indicated by its relation to two or more specifiers that are not mentioned directly, but described as members of another clade that fulfill certain criteria. Such definitions may first describe an unnamed clade and then use its extant members (or those fulfilling another criterion) as specifiers for a minimum-clade definition:
    *   A maximum-modified crown clade definition [note the addition of "-modified" to avoid confusion because crown clades are minimum clades] may take the form [...]
    *   An apomorphy-modified crown clade definition may take the form [...]
 *   A crown clade in its entirety, mentioned by name, can be the internal specifier in the definition of the name of a total clade under the conditions specified in Art. 10.5. [This fact contradicts a claim in Note 11.1.2.]

[deletion of the two paragraphs that follow this list in the proposal we're currently discussing]

The above list is not exhaustive. Most importantly, definitions may contain qualifying clauses that restrict their applications to specific phylogenetic hypotheses (Art. 11.9).

The system of abbreviations used here [...]

For abbreviations involving qualifying clauses, see Note 11.9.1.



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--
Michel Laurin
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Muséum National d’Histoire Naturelle
Batiment de Géologie
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FRANCE
http://www2.mnhn.fr/hdt203/info/laurin.php

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