Pentecopterus decorahensis: Ancient Giant Sea Scorpion Unearthed in Iowa

The fossil of a previously unknown species of eurypterid that lived 460 million years ago (Middle Ordovician period) has been discovered in Iowa. The creature, Pentecopterus decorahensis, is the oldest known species of eurypterid (sea scorpion) – a group of aquatic arthropods that are ancestors of modern spiders, lobsters, and ticks. The discovery published in [...] —> Read More