SINCLAIR STAMMERS / SCIENCE PHOTO LIBRARY SINCLAIR STAMMERS / SCIENCE PHOTO LIBRARY
Trilobite fossil. Fossilised Selenopeltis buchi trilobite. This trilobite lived during the Ordovician period (around 505-438 million years ago). The trilobites are an extinct group of marine arthropods with a hard, segmented shell that is divided into 3 sections. S. buchi possessed long spines, which protruded from the segments of its thorax (left and right). Most trilobites were bottom dwellers, feeding either on organic sediment on the ocean floor or by catching their own prey. Many could roll themselves into a ball when threatened, ensuring that only the shell was exposed to attackers. Found in Morocco.
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