Early ammonites had simple suture lines traced across their shells, while the sutures on species from the Cretaceous period (145 to 66 million years ago) formed intricate patterns that may have ...

These animals are known from the Jurassic Period, from about 200 million years ago. Most ammonites died out at the same time as the non-avian dinosaurs, at the end of the Cretaceous Period, 66 million ...

Long before the carnage began, the Cretaceous picked up where the Jurassic ... long-necked and toothy marine reptiles terrorized fish, ammonites, and mollusks in the seas; pterosaurs and hairy ...

Koichi Fukuoka’s career as a copperplate engraver took an unexpected turn after he encountered fossils of ammonites, a spiral-shelled creature that lived in the age of the dinosaurs. The artist ...

The fossils he collected from the Jurassic rocks of the neighbourhood led him to publish a series of works, including monographs on the British Jurassic and Cretaceous echinoids (also reissued in this ...

Exquisitely preserved fossils of a shark that thrived during the Cretaceous period appear to ... such as large ammonites and sea turtles.” While the individuals they studied are small, at ...

"From ammonites to bivalves, these ancient marine creatures reveal secrets from the Lower Cretaceous Period." Despite the boreholes being 102mm (four inches) in diameter, a few intact and well ...