2.1" Harpides With Two Asaphellus Trilobites - Fezouata Formation

Harpides With Two Asaphellus Trilobites - Fezouata Formation #213181

This is an excellent 2.1" Harpides trilobite associated with a pair of Asaphellus from the Lower Fezouata Formation of Morocco. They have all been prepared to bring them out in high relief against the shale. The red coloration is due to the oxidization of iron pyrite into limonite.

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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