User:Abyssal/Portal:Jurassic/Selected picture/22

A fossil shell of the parkinosoniid ammonoid Parkinsonia compressa. The shell dates back to the Bathonian age (166.1–168.3 million years ago) of the Middle Jurassic epoch and is about 38 mm in diameter. It was collected near Sengenthal, Germany. Photo credit: H. Zell