[Geology2] Ichthyosaurs faced mass extinction

The sea dragons bounce back
PhysOrg.com [USA], May 4, 2011

The evolution of ichthyosaurs, important marine predators of the age of
dinosaurs, was hit hard by a mass extinction event 200 million years
ago, according to a new study from the University of Bristol published
in PNAS.

http://www.physorg.com/news/2011-05-sea-dragons.html

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