This Specimen has been sold.
2.4" Paralejurus Trilobite - Ofaten, Morocco
This is a 2.4" long specimen of the Corynexochida trilobite, Paralejurus rehamnanus. It was quarries near Ofaten, Morocco Morocco and the preparation is quite nice. You can see all of the detail including distinctive terrace lines on the shell. There is about 5% shell restoration on this specimen (patch on right side of head and on axis)
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 currently described species, filling nearly every evolutionary niche. Due in large part to a hard exoskeleton (shell), they left an excellent fossil record.