1. JURASSICA Museum, 2900 Porrentruy, Switzerland, and Department of Geosciences, University of Fribourg, 1700 Fribourg, Switzerland
2. Section d'archéologie et paléontologie, Office de la culture, République et Canton du Jura, 2900 Porrentruy, Switzerland —email:
3. Department of Geosciences, University of Fribourg, 1700 Fribourg, Switzerland —email: