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Systematic Biology 2004 53(1):92-94; doi:10.1080/10635150490264824
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© 2004 Society of Systematic Biologists

Untangling Coevolutionary History

Edited by David Reed: Associate Editor

Kevin P. Johnson1 and Dale H. Clayton2

1 Illinois Natural History Survey Champaign, Illinois 61820, USA; E-mail: kjohnson@inhs.uiuc.edu
2 Department of Biology, University of Utah Salt Lake City Utah 84112, USA

Accepted September 12, 2003
The first 150 words of the full text of this article appear below.

Organisms in nature exist in complex environments where they interact with a diversity of other species. Just as interactions between species are fundamental to ecological studies, they also are integral to understanding many macroevolutionary patterns of diversification. Chief among these are the coevolutionary patterns apparent between closely interacting groups, such as hosts and parasites, or mutualists. A variety of historical processes play a role in the diversification of interacting taxa. These processes occur on a variety of scales, ranging from the intracellular to the community level, and across a diverse array of taxa, ranging from viruses to vertebrates.

Recent phylogenetic studies reveal that the phylogenies of interacting taxa are often very similar, sometimes identical. This similarity is most often generated by repeated instances of cospeciation, the simultaneous speciation of interacting taxa. Alternatively, a number of processes can reduce the congruence between phylogenies of closely interacting taxa. These processes include switching, . . . [Full Text of this Article]


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