Trilobites were marine arthropods, and are named for their 3-lobed, segmented bodies. They thrived in early Paleozoic oceans around the world, and eventually died out in the mass extinction that occurred at the end of the Permian Period 250 million years ago. They existed for approximately 300 million years. They are believed to be related to modern horseshoe crabs.
This collection of trilobite fossils are believed to be of the genus Calymene, dating from the Ordovician Period (505 to 438 million years ago). Because they are cast in sandstone, they are fragile.
NOTE: The item photographed is similar to the one you will receive. These fossil trilobites are approximately 2" in length, and weigh about an ounce each.. Country of origin: Morocco.