.9" Gerastos Trilobite Fossil - Morocco

This is a bargain specimen of the proetid trilobite Gerastos granulosus from Issoumour, Morocco. It's very 3d and detailed with no restoration. A great starter trilobite for a collection.

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 described species, filling nearly every evolutionary niche. Due in large part to a hard exoskeleton (shell), they left a excellent fossil record.