What is ammonitas?

Ammonitas is actually spelled "ammonites" and refers to a group of extinct marine mollusks that lived during the time of the dinosaurs in the Jurassic and Cretaceous periods, approximately 200-66 million years ago. They are characterized by their spiral shell that has a distinctive ridged or ribbed pattern. Ammonites were abundant and diverse in the ancient oceans and had a variety of shell shapes and sizes. Some ammonite fossils have been found measuring up to 9 feet in diameter. They were carnivorous and used tentacles to capture prey and bring it to their beak-like mouth. Ammonites went extinct around the same time as the dinosaurs, possibly due to changes in the ocean environment caused by a massive asteroid impact. Today, ammonite fossils provide important clues to the history of life on Earth and are prized by collectors and paleontologists alike.