User:Abyssal/Portal:Jurassic/Selected picture/15

A fossil shell of the phylloceratid ammonoid Holcophylloceras calypso. The shell dates back to the Toarcian age (174.1–182.7 million years ago) of the Early Jurassic epoch and is about 2.5 cm in diameter. It was collected near Mende, France. Photo credit: H. Zell