[Taxacom] "Tenuinucelli" clade in eudicots?
Richard.Zander at mobot.org
Fri Feb 25 09:43:56 CST 2011
Ken Kinman asks "Is there any definitive evidence (either molecular or
morphological) that clearly answers this question?"
My opinion is that evidence does not answer questions, theories do.
There are theories that answer Ken's question, even based on the same
evidence. One is that a deep ancestor provided the trait for all
presentday taxa, and that deep ancestor, most parsimoniously, is the
same as one of the presentday ancestors.
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Richard H. Zander
Missouri Botanical Garden, PO Box 299, St. Louis, MO 63166-0299 USA
Web sites: http://www.mobot.org/plantscience/resbot/ and
Modern Evolutionary Systematics Web site:
From: taxacom-bounces at mailman.nhm.ku.edu
[mailto:taxacom-bounces at mailman.nhm.ku.edu] On Behalf Of Kenneth Kinman
Sent: Thursday, February 24, 2011 9:14 PM
To: taxacom at mailman.nhm.ku.edu
Subject: [Taxacom] "Tenuinucelli" clade in eudicots?
Peter Stevens' APG Website lists one single character uniting
their large Order Ericales with the euasterids: ovules tenuinucellate.
However, Order Cornales (which I still place splitting off between them)
also have tenuinucellate ovules. I think I remember a suggestion that
tenuinucellate ovules might possibly be produced by more than one
pathway, but if so, this seems to make such a character even less
So is the sister group to euasterids (equal to my Subclass
Asteridae), the Order Cornales or the ericalean orders (APG's single
large Order Ericales, which equals my more traditional group of
Ericalean Orders)? Is there any definitive evidence (either molecular
or morphological) that clearly answers this question?
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