This Specimen has been sold.
Pair Of Well Prepared Paralejurus Trilobites - Mrakib, Morocco
This is a pair of nicely prepared Paralejurus trilobite fossils quarried near Mrakib, Morocco. The larger specimen is 3.05" long with a smaller, 1.2" long individual underneath it's tail. Excellent shell detail on both trilobites with tiny eye facets visible under magnification.
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.