Two Ordovician Trilobite (Ampyxina) Fossils - Missouri

These are two prone specimens of the Ordovician trilobite Ampyxina bellatula. These trilobites were collected from the Maquoketa Formation of Pike County, Missouri. The largest trilobite is .43" long.

It comes with an acrylic display stand.

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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