.65" Pseudocryphaeus (Cryphina) Trilobite - Lghaft, morocco
Here is a cute Pseudocryphaeus trilobite from the Devonian of Morocco. It's a elegant example of the order Phacopida with a distinctive rostrum projecting from the front of it's head. The eye facets can easily be seen, there is great detail and the dark chocolate color contrasts very nicely with pinkish-brown limestone.
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.