Trilobite fossils

Trilobite fossils

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Credit: SINCLAIR STAMMERS/SCIENCE PHOTO LIBRARY

Caption: Trilobite fossils. Two fossilised Proteus sp. trilobites. The trilobites are an extinct group of marine arthropods with a hard, segmented shell that is divided into 3 sections. They lived from the Lower Cambrian to the Upper Permian period (around 543-248 million years ago). Most were bottom dwellers, feeding either on organic sediment or by catching their own prey. Many trilobites could roll themselves up into a ball when threatened. Assuming this position ensured that only the shell was exposed, defending the animal from attack. Found in Morocco.

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Keywords: ancient, animal, animals, arthropodans, couple, extinct, fossil invertebrate, fossilised, fossils, geology, invertebrates, marine, moroccan, morocco, north african, old, pair, palaeontology, paleontology, preserved, proteus sp., rock, segmented, segments, shell, stone, trilobites, two, zoology

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