Cluster Of Foulonia & Euloma Trilobites - Fezouata Formation

This is a 8.6" wide piece of shale containing a pair of Foulonia trilobites, a pair of Euloma trilobites and a partial Foulonia. It comes from the Lower Ordovician, Fezouata Formation of Morocco and the trilobites have been prepared to bring them out in high relief against the rock.

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: over 25,000 species have been described, filling nearly every evolutionary niche. Due in large part to their hard exoskeletons (shells), they left an excellent fossil record.

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