DIRK WIERSMA / SCIENCE PHOTO LIBRARY DIRK WIERSMA / SCIENCE PHOTO LIBRARY
Slimonia is a genus of the order of Eurypterids, an extinct genus of water scorpions that lived in the Late Silurian Period, about 430 to 415 million years ago. Unlike other Eurypterid species Slimonia lived exclusively in freshwater environments where it fed on small fish. It had a cordate body that could grow very long, up to 2 meters and moved about on thin legs. Provenance of this sample, Slimonia acuminate, 60 cm in length, is Herefordshire, England.
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