Trilobites existed for over 250 million years, first appearing over 500 million years ago, and finally dying out during the Great Permian Extinction Event, approximately 252 million years ago. Over 20,000 species are known to have existed. Their fossils are found throughout the world. We offer several different species of trilobite fossils, mostly from Morocco. The most common is Diacalymene, which lived during the Ordovician Period. Others found in Morocco include various species of the genus “Gerastos”, which existed during the Devonian Period. These are considered “regular” Moroccan fossils which are available for sale. Every fossil we offer is authentic. Please take your time to view what we have to offer. We have a large supply, and will be adding additional fossils to our website as we process our inventory.