Based on the fossil record, ammonites came in a wide range of sizes and shapes, from smaller than an inch to as large as nine feet wide. Some ammonites had long, straight shells, while others had ...

Omanyte is based on ammonite, a prehistoric marine mollusk. Ammonites existed for an astonishingly long period, from the Devonian (around 409 million years ago) to the Cretaceous (66 million years ...

The most recent discovery last year was an ammonite piece and trace fossil ... the most abundant and diverse group of fish during the Devonian period, which was 419 to 359 million years ago.