Eurypterid - Eurypterus remipes

The Eurypterus remipes was the first eurypterid fossil to be discovered and is the State Fossil of New York! These “sea scorpions” varied from only 5 inches long to over 4 feet in length. Although they look similar to today’s lobsters, the closest living relative to these creatures are actually horseshoe crabs, spiders, and scorpions.

Silurian (~430 million years ago)

Williamsville Formation, Buffalo, New York