A cone-shaped fossil shell of an extinct marine mollusk from the order Gyrocerida, featuring tightly coiled chambers.
From gyro- (Greek 'circle') combined with 'ceracone,' a paleontological term. These shells belong to ancient cephalopods that lived millions of years ago.
Gyroceracones were early nautiloid relatives—their spiral shells tell us that ocean creatures were perfecting spiral geometry long before nature invented snail shells!
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