Pterygotus Silurian Sea Scorpion T-Shirt Color:White offered in classic white and

offered in classic white and earthy olive green for a timeless

This vintage-style design blends paleontology and ecology

curved cranial crest—thought to have been used for communication or display—the Parasaurolophus is one of the most recognizable hadrosaurs

capturing the humor and power of one of the most iconic armored dinosaurs from the Late Cretaceous period

Pterygotus Silurian Sea Scorpion T-Shirt Color:White offered in classic white andArtist: ldn_rdnt_art From the artist: A scorpions cool. A prehistoric giant sea scorpions even cooler. Pterygotus was a eurypteridan extinct marine arthropodthat could reach about 6 feet long. It was among the apex predators of the Silurian seas roughly 420 million years ago.