Info req.: molecules/morphology

[Thomas Lammers]

Can anyone suggest recent papers that address in any detail the idea that
clades that emerge in phylogenetic analyses of molecular data require
morphological or other non-molecular synapomorphies before it is practical
to recognize them formally?  I am particularly interested in commentary or
theoretical papers on this topic, rather than primary research papers in
which the topic had to be dealt with, though anything would be helpful.

Thank you for your help.

Thomas G. Lammers, Ph.D.

Assistant Professor and Curator of the Herbarium (OSH)
Department of Biology and Microbiology
University of Wisconsin Oshkosh
Oshkosh, Wisconsin 54901-8640 USA

e-mail:       lammers at uwosh.edu
phone:      920-424-7085
fax:           920-424-1101

Plant systematics; classification, nomenclature, evolution, and
biogeography of the Campanulaceae s. lat.
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"Today's mighty oak is yesterday's nut that stood his ground."
                                                 -- Anonymous