This is a rare Scutellid (Platy Scutellum massai) trilobite from Aatchana, Morocco. It would measure about 1,5" long if outstretched. It has about 2% shell restoration in total along repaired cracks
 Trilobites were a very diverse group of extinct marine arthropods. They first appeared in the fossil record in the Early Cambrian (521 million years ago) and went extinct during the Permian mass extinction (250 million years ago).