This Specimen has been sold.
1.8" Kayserops Trilobite - Issoumour, Morocco
This is a detailed 1.8" long Kayserops trilobite collected at Jebel Issoumour, Morocco. This is a nice specimen of an uncommon species. It's nicely prepared with clear eye facets in both eyes and the only restoration is some touchups along the 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). 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.