User:Abyssal/Portal:Jurassic/Selected picture/20

A fossil shell of the hildoceratid ammonoid Grammoceras thouarsense. The shell dates back to the Toarcian age (174.1–182.7 million years ago) of the Middle Jurassic epoch and is about 4.5 cm in diameter. It was collected near Mende, France. Photo credit: H. Zell