Trilobite fossil

Credit: JIM AMOS/SCIENCE PHOTO LIBRARY

Caption: Trilobite fossil. This bottom dwelling marine arthropod inhabited seas between the Cambrian and Permian periods, 542-250 million years ago. It scavenged for food on the seabed. Photographed in Utah, USA.

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Keywords: american, animal, animals, arthropod, benthic, bottom-dweller, cambrian period, extinct, fauna, fossil, fossil invertebrate, fossilised, fossils, invertebrate, invertebrates, marine, north america, north american, one, palaeontology, paleontology, prehistoric, prehistory, scavenger, single, trilobite, united states, us, usa, utah, wildlife

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