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This is an Ancyloceras (Audiloceras) ammonite. It has what is known as a heteromorph shape. While most ammonites have spiral shells that retain the same shape throughout growth (homeomorph), a major group of ammonites, the Ancyloceratina, emerged during the Late Jurassic that had uncoiled shells and was called heteromorph ammonites (different-shaped). While little is known of their mode of life, their uncoiled shells would have precluded fast swimming. As with all ammonites, these went extinct at the end of the Cretaceous period.

HAF/FS (Free Standing) approximately 12″ tall x 9″ wide

HAF is approximately 12″ wide x 8.75″ tall  (stand not included)

Heteromorph Ammonite Fossil

$180.00

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SKU: HAF_PARENT Categories: ,