Ordovician Period. 488-444 million years ago. 460 mya - Eurypterids Appear 450 mya – Chondrichthyes 444 mya – Mass extinction. 460 million years ago. Eurypterids Appear “Sea Scorpion” Largest arthropod to ever live (2 meters or 6 feet long) Predator of the sea.
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(2 meters or 6 feet long)
marks the end of the
Ordovician most likely due to glaciation of Gondwana…
THERE WAS NO LIFE ON LAND STILL!
Ordovician was the time where marine life diversified!