[Taxacom] London - Systematics Association Lecture and AGM, 9thDec

Richard Zander Richard.Zander at mobot.org
Mon Dec 7 10:51:27 CST 2009


My reading supports the idea that there is evidence for both gradualism
and punctuated equilibrium in the fossil record. Telling which extant
taxa might still be affected (genome record, e.g.) is difficult since
extinction masks much.

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Richard H. Zander 
Voice: 314-577-0276
Missouri Botanical Garden
PO Box 299
St. Louis, MO 63166-0299 USA
richard.zander at mobot.org
Web sites: http://www.mobot.org/plantscience/resbot/
and http://www.mobot.org/plantscience/bfna/bfnamenu.htm
Modern Evolutionary Systematics Web site:
http://www.mobot.org/plantscience/resbot/21EvSy.htm
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-----Original Message-----
From: taxacom-bounces at mailman.nhm.ku.edu
[mailto:taxacom-bounces at mailman.nhm.ku.edu] On Behalf Of Stephen Thorpe
Sent: Thursday, December 03, 2009 8:39 PM
To: Robin Leech; mivie at montana.edu; John Grehan
Cc: taxacom at mailman.nhm.ku.edu
Subject: Re: [Taxacom] London - Systematics Association Lecture and
AGM,9thDec

Even today, the common assumption that 'the greater the morphological
and/or genetic differences between two taxa, the further back the
divergence between them' is residual gradualism...





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