Barrandeops & Cyphaspis Trilobite Association - Foum Zguid

This is an association of two different types of trilobites from Foum Zguid, Morocco. There is a 1.9" long, prone Barrandeops with good eye facet detail and a Cyphaspis eberhardiei missing it's tail but with free-standing spines. There are some areas of shell weathering on both trilobites.

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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