Eurypterid cast replica #1 Human this high-quality cast highlights the

this high-quality cast highlights the delicate structure and defining features of a juvenile skull

Edmontosaurus denial skull cast replica

or group of similar footprints

Mosasaurs were among the first fossils recognized and scientifically described

said collector Jim Conway

Eurypterid cast replica #1 Human this high-quality cast highlights theEurypterid cast replica Eurypterids (sea scorpions) are an extinct group of arthropods related to arachnids, which include the largest known arthropods that ever lived. They are members of the extinct class Eurypterida (Chelicerata). The word Eurypterid comes from the Greek word eury meaning "broad" or "wide" and the Greek word pteron meaning "wing". The largest, such as Jaekelopterus, reached 2 meters (6 ft 7 in) or more in length, but most species