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Science 20 April 1984:
Vol. 224. no. 4646, pp. 281 - 283
DOI: 10.1126/science.224.4646.281
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Articles

Cenozoic High Latitude Heterochroneity of Southern Hemisphere Marine Faunas

WILLIAM J. ZINSMEISTER 1 and RODNEY M. FELDMANN 2

1 Institute of Polar Studies, Ohio State University, Columbus 43210
2 Department of Geology, Kent State University, Kent, Ohio 44242

Discovery of 11 genera, in five classes within the Mollusca, Echinodermata, and Arthropoda in upper Eocene rocks on Seymour Island, Antarctica, previously known only from Late Cenozoic in mid-latitudes, suggests that the high latitude region of the Southern Hemisphere acted as a center of origin and dispersal for a broad spectrum of taxa. Precursors to modern deep- and shallow-water mid-latitude forms evolved and flourished in the high latitudes until conditions in lower latitudes favored their dispersal. These observations of Antarctic marine invertebrates corroborate those recently made about terrestrial mammals and plants in the Arctic.

Submitted on November 25, 1983
Accepted on February 21, 1984


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
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