This Specimen has been sold.
Bargain, 3" Spiny Comura Trilobite - Oufaten, Morocco
This is a 3" long Comura bultyncki trilobite from Oufaten, Morocco. It's fairly good sized for the species but a the preparation is a bit rough, hence the bargain price. Many of the smaller spines appear to be composites or just badly reattached during preparation.
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.