This Specimen has been sold.
Stunning Crotalocephalina & Reedops Trilobite Association
This is a stunningly prepared, natural association of three trilobites collected from the Lhandar Formation near Atchana, Morocco. There is a large Crotalocephalina which would be about 3 1/2" if outstretched along with two enrolled reedops. Beautiful shell preservation on all of the trilobites. The surrounding limestone has been sculpted to create an aesthetic, free-standing preservation for the trilobites.
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.