Species Duration and Evolution: Benthic Foraminifera on the Atlantic Continental Margin of North America

Average species durations were estimated for 131 commonly occurring modern species. The duration of species occurring at depths of less than 200 meters is 16 million years, while for those at greater than 200 meters and at all depths it is 25 to 26 million years. Species (less than 200 meters) distr...

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Bibliographic Details
Published in:Science
Main Authors: Buzas, Martin A., Culver, Stephen J.
Format: Article in Journal/Newspaper
Language:English
Published: American Association for the Advancement of Science (AAAS) 1984
Subjects:
Newfoundland
Online Access:http://dx.doi.org/10.1126/science.225.4664.829
https://www.science.org/doi/pdf/10.1126/science.225.4664.829
Description
Summary:Average species durations were estimated for 131 commonly occurring modern species. The duration of species occurring at depths of less than 200 meters is 16 million years, while for those at greater than 200 meters and at all depths it is 25 to 26 million years. Species (less than 200 meters) distributed from Florida to Newfoundland and from Florida to Cape Hatteras have about the same durations (18 to 20 million years). The duration for species restricted to north of Cape Hatteras is only 7 million years. The data suggest that evolutionary rates are greater in shallower than in deeper depths and greatest in the shallower northern area.

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