This is a top quality, Drotops armatus trilobite quarried near Zireg, Morocco. With somewhere around 100 free standing spines it would have been a very unappetizing dinner for it's predators.
At over 5" long it's good-sized for the species and the preparation is extremely nice. It has a natural multi-toned coloration, great eye facet preservation and the spines are all original, not composites. Restoration is minimal, mostly some touchups along repaired cracks and some shell restoration on the right cheek.
This is one of the nicest, large Drotops armatus that I've encountered.
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). They were one of the most successful of the early animals on our planet with over 25k described species, filling nearly every evolutionary niche. Due in large part to a hard exoskeleton (shell), they left a excellent fossil record.