This Specimen has been sold.
2.5" Paralejurus Trilobite Fossil - Orange Eyes!
This is a 2.5" long Paralejurus trilobite quarried near Atchana, Morocco. It is unique in that the eyes are naturally orange in color, and you can see thousands of eye facets in them under magnification. Unfortunately the preparation is a bit rough in areas leaving scratches on the shell.
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.