Fossiler

Eocene - Green River formation - Uintah County, Utah, USA Mer

Eocene, Green River Formation - Kemmerer, Wyoming, USA Mer

Pleistocene (35,000 years) - gravel-pit Karlsruhe area Germany Mer

Silurian (410 m.y.a), New York State, USA Mer

Cretaceous (145-100 million years) - Santana Formation - Araripe - Brazil Mer

Lutetian, Eocene - Fleury la Rivière, France Mer

Middle Devonian, approximately 380 million years old - Djebel El Mrakib, Morocco Mer

Pleistocene - Southern Germany Mer

Jurassic Sinemurian - Balingen, Germany Mer

Priabonian - Daklaa, Morocco Mer

Cretaceous, Turonian - Asfla, Morocco Mer

Carboniferous, Westphalian A/B - South Limburg, Netherlands Mer

Cretaceous, Turonian - Asfla, Morocco Mer

Geological era: Middle Eocene (approx. 520 million years old) - Discovery site: Anti-Atlas, Morocco Mer

Lower Jurassic , Hettangian - Aveyron, France Mer

Miocene, Tortonian - Tazgait, Mostaganem, Algeria Mer

Jurassic - Callovian - Niort, France Mer

Toarcian, lower jurassic - Brionnais, France Mer

Devonian, Eifelian - near Alnif, Morocco Mer

Kimmeridgian - Yves, Charente Maritime, France Mer

Barremian, Cretaceous - Agadir area, Morocco Mer