A genus of extinct sea scorpions that lived in ancient oceans and are important fossils for understanding early marine life.
From Greek 'eury-' meaning 'wide' and 'pteron' meaning 'wing' or 'fin', referring to their broad paddles used for swimming.
Eurypterus fossils are so common in New York State rocks that it's the state fossil, and they tell us that New York was once covered by vast ancient seas teeming with these creatures!
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