This Specimen has been sold.
2.2" Detailed Hollardops Trilobite With Cyphaspis - Ofaten, Morocco
This is a really nice association of a 2.2" long Hollardops mesocristata along with a Cyphaspis from Ofaten, Morocco. Excellent preparation and shell detail on both specimens. All of the spines on the Cyphaspis have been prepared free of the limestone.
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.