Fossil specimen of the heteromorph ammonoid Diplomoceras maximum, on display at the Museum of the Earth in Ithaca, New York (PRI 13889). This specimen was discovered by Dr. William Zinsmeister and Dr. Anton Oleinik in Cretaceous-aged rocks on Seymour Island, Antarctica. The complete length of this twisted ammonoid’s shell is approximately 4 meters. Model created by Emily Hauf.
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