1" Tropidocoryphe Trilobite - Uncommon Proetid With Axial Spines
This is a fairly scarce type of Proetid trilobite (Tropidocoryphe) from Morocco. The specimen would be just over an inch long if outstretched and has a natural, multi-toned shell coloration. An exceptional specimen of this rarely seen trilobite.
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.