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Dactylioceras Ammonite Fossil 180 MYO Germany #16501 16o


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This is a Dactylioceras ammonite, Harpoceras fossil from Germany.   It dates back to the Jurassic time period approximately 180 million years ago.   Ammonites were soft-bodied marine molluscs that lived in spiral, compressed, multi-chambered shells.   The outermost chamber of the shell housed the animal itself.  Ammonites are excellent index fossils, which means that the presence of a particular ammonite species in a geologic strata helps to identify the age of the fossils found in that layer.   This is because certain species of ammonites only lived during specific time periods.

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