2.6" Crotalocephalina Trilobite - Foum Zguid, Morocco
This is a nicely prepared, 2.6" long specimen of Crotalocephalina gibbus quarried near Foum Zguid Morocco. It's a fine specimen with excellent shell preservation. The limestone around it has been removed and sculpted so that it displays aesthetically on a pedestal of rock with the pleural spines and head free of the matrix. No restoration.
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.