Ordovician reefs were also home to large sea lilies, relatives of sea stars. Anchored to the bottom inside calcareous tubes, they collected food particles with feathery arms that waved in the ...

Institute of Paleobiology, Polish Academy of Sciences, Twarda 51/55, 00-818, Warszawa, Poland. Faculty of Biology, Institute of Evolutionary Biology, Biological and Chemical Research Centre, ...

Fortunately for us (though unlucky for the ancient arthropod), a previously undiscovered sea creature died in just the right ...

But first there was a period of biological regrouping following the disastrous climax to the Ordovician. The recovery soon got under way in the oceans as climbing temperatures and rising sea ...

"The Ordovician Period ushered in significant changes in plate tectonics, climate, and biological systems. Rapid seafloor ...