A sea scorpion, 435 million B.C.

pterygotus-1At left is Pterygotus, an ancient five-foot-long eurypterid predator that hunted trilobites and fish, one of the largest arthropods that ever lived. Fossilized specimens were found in exposed bedrock in a ditch alongside Beverly Drive in Fairmount Hills, probably during the laying out of the streets for the subdivision in the 1930s. (Similar fossils were found further west around Mansfield Drive.) B

 

[Source: Journal of Paleontology Vol. 35, Society of Economic Paleontologists and Mineralogists, 1961, p.64.]

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