Fossil Graptolites (IMAGE)

University of Chicago

Fossil Graptolites

Caption

This petri dish contains fossil graptolites, a group of long-extinct plankton. These particular colonies belong to the diplograptine species Geniculograptus typicalis, and floated in a shallow ocean that covered Ohio about 449 million years ago. “We don’t know much about their ecology, but their fossil record is extremely detailed,” said UChicago’s David Bapst.

Credit

Lloyd DeGrane

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News organizations may use this image in connection with reports about the research of Charles Mitchell and David Bapst.

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