Here is a picture of a Parapatoceras sp. ammonite fossil at the Museo di Paleontologia at Sapienza University of Rome Italy. Creatures like this existed in the middle Jurassic Period (ICS geological timescale: Bathonian). Fossil was found in France.
Image taken in June 2014.
Sources:
http://www.ammonites.fr/Fiches/9999.htm
