Location: Buffalo Area, NY
And the Sholesonian finally has a Eurypterid for the fossil collection! These creatures are otherwise known as 'sea scorpions' and populate New York rock formations from the Silurian (~440 million years ago)! So much so that the species Eurypterus remipes has become the state fossil. These were the largest arthropods to ever exist with Jaekelopterus rhenaniae reaching sizes of 2.5 meters (that's about 8 feet tall!), however most species reach average lengths comparable to this specimen.
This particular specimen comes from the Williamsville (A) Formation of Western New York and is a negative impression. I had been searching for a good quality specimen that showed both swimming paddles, and was able to acquire this piece after receiving a generous graduation gift years ago that was earmarked for a fossil. There is a plethora of information available on these guys so check out the eurypterus page to give you a head start. Also, for those in New York, the Paleontological Research Institute has the largest complete eurypterid specimen on display if you get a chance to check it out.