[Taxacom] "Tenuinucelli" clade in eudicots?
jim.croft at gmail.com
Tue Mar 1 00:00:44 CST 2011
That is what I would have thought. The evidence is that taxa as
circumscribed have certain characters, with some toing and froing
about whether these are indeed the same characters wit the same origin
or only apparently so. Whether this and the names are step 0, or even
step -1, I am not fussed.
Once we have agreement on the shared traits (the evidence), the
mechanism of how those shared states may have got there is the
hypothesis, not the evidence. And then the polemic and story-telling
On Tue, Mar 1, 2011 at 10:44 AM, Richard Zander
<Richard.Zander at mobot.org> wrote:
> Attempts to classify by evolutionary relationships are in two stages. One,
> determine evolutionary relationships (if you can, to whatever extent you
> can). Two, classify. This assumes the zero step of identification,
> description, and naming. It is the zero step you refer to, Jim, I think.
> One fact is that both groups have this trait. The interpretation of the
> evolutionary significance of the trait is the knotty part, which we argue
> about but leads to evolutionary classification.
> Richard H. Zander
> Missouri Botanical Garden
> PO Box 299
> St. Louis, MO 63166 U.S.A.
> richard.zander at mobot.org
> From: Jim Croft [mailto:jim.croft at gmail.com]
> Sent: Sat 2/26/2011 3:18 PM
> To: Richard Zander
> Cc: Kenneth Kinman; taxacom at mailman.nhm.ku.edu
> Subject: Re: [Taxacom] "Tenuinucelli" clade in eudicots?
> To be picky, isn't the evidence simply that both groups have
> tennuicellate ovules, and nothing more? Interpretation of the origin,
> meaning, significance and implication of this is something else.
> On Sunday, February 27, 2011, Richard Zander <Richard.Zander at mobot.org>
>> Okay, Ken. This may be difficult to accept, but the fact that both groups
>> have tenuinucellate ovules is evidence that both share a deep ancestor,
>> whether they are sister groups or not. The fact is evidence that provides a
>> theory, which can be compared with other theories, falsified maybe,
>> supported maybe, etc.
> Jim Croft ~ jim.croft at gmail.com ~ +61-2-62509499 ~ http://about.me/jrc
> 'A civilized society is one which tolerates eccentricity to the point of
> doubtful sanity.'
> - Robert Frost, poet (1874-1963)
> Please send URLs, not attachments:
Jim Croft ~ jim.croft at gmail.com ~ +61-2-62509499 ~ http://about.me/jrc
'A civilized society is one which tolerates eccentricity to the point
of doubtful sanity.'
- Robert Frost, poet (1874-1963)
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