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Do centers of origin have a center?

Published online by Cambridge University Press:  08 February 2016

John C. Briggs
John C. Briggs*
Affiliation:
Department of Marine Science, University of South Florida, St. Petersburg, 33701
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Extract

A current question being debated with considerable intensity is whether or not certain geographic areas act as centers of evolutionary radiation and supply species to other areas that are less active or less effective in an evolutionary sense. Darwin (1859) was the first to write about centers of origin which he called “single centers of creation.” He argued that each species was first produced within a single region and that it subsequently migrated from that area as far as its powers of migration and subsistence under past and present conditions permitted. Adams (1902), in discussing the influence of the southeastern United States as a center of distribution for the flora and fauna of North America, provided a series of criteria for the determination of “centers of dispersal.” His first, and evidently most important criterion was the location of “the greatest differentiation of a type.”

Type
Current Happenings
Information
Paleobiology , Volume 7 , Issue 3 , Summer 1981 , pp. 305 - 307
Copyright
Copyright © The Paleontological Society 

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References

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