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Contact: Steve Koppes
s-koppes@uchicago.edu
773-702-8366
University of Chicago
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
Usage Restrictions: News organizations may use this image in connection with reports about the research of Charles Mitchell and David Bapst.
Related news release: Explosive evolution need not follow mass extinctions, study of ancient zooplankton finds
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