2.8" Calymene (With Shell) Trilobite - Tazarine, Morocco

The commonly seen Calymene trilobites from Morocco are preserved as internal molds without any shell remaining. This unusual specimen from a different location near Tazarine, Morocco has a different mode of preservation with a chocolate brown shell still preserved. It's 2.8" long and very inflated.

The rock here is extremely hard, much harder than most of the limestones in Morocco making the preparation very difficult and time consuming. This is probably one of the reasons why you almost never see these Calymene trilobites with preserved shell on the market.

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.
Calymene sp.
Tazarine, Morocco
2.8" long
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