Trilobites are a well-known fossil group of extinct marine arthropods, one of the earliest known groups. They first appeared in the fossil record in the Early Cambrian Period (526 million years ago), flourishing throughout the lower Paleozoic Era before beginning a drawn-out decline to extinction when, during the Devonian Period, almost all trilobite orders died out before finally disappearing in the mass extinction at the end of the Permian Period, about 250 million years ago. Trilobites were among the most successful of all life forms, roaming the oceans for over 270 million years. Offered here is a trio of complete fossilized trilobites, including Asteropyge perforata and two examples of Odontochile hausmanni. These fossils date to the Devonian Period (419.2–358.9 million years ago) and were unearthed in Morocco. The Asteropyge measures 2" long and is nicely preserved, w/the spines nicely preserved and both eyes remarkably well preserved, w/an amazing amount of detail visible. The Odontochile measure 1.75" and 2-1/8" long. The larger specimen's fossilization give it the appearance of crawling over the stone matrix it is encased within as the creature's body is bent as if crawling. Nice grouping of trilobites in wonderful condition. From the Robert M. Overstreet Collection and comes with COA.