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More model informationAmmonoids, commonly known as ammonites, are a group of extinct marine mollusc animals closely related to living coleoids (octopuses, squid, and cuttlefish). The ammonites existed during the time of the dinosaurs. Ammonites are index fossils. It is often possible to link the rock layer in which a particular species or genus is found to specific geologic time periods. This ammonite is from the family Acanthoceratidae that lived from the Albian to early Coniacian stages of the Cretaceous (100 - 113 million years ago).
Thanks to UK Geology Project for providing this fossil specimen.
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