Fosile

Maastrichtian, upper cretaceous - Hell creek formation - Dawson County, Montana - USA Mai mult

Eocene, Green River Formation - Kemmerer, Wyoming, USA Mai mult

Cretaceous, Maastrichtian - Uled Abdoun, Khouribga, Morocco Mai mult

Norien, Trias - Timor Mai mult

Maastrichtian, Kaoguo Formation - Xixia Basin, Henan Province, China Mai mult

Lower Triassic - Ambilobe area, Madagascar Mai mult

Middle Eocene, Lutetian, approx. 48 million years ago - Messel pit near Darmstadt, Hessen, Germany Mai mult

Mississippian, Carboniferous (345 mil y) - Crawfordsville, Indiana, USA Mai mult

Eocene, Green River Formation - Fossil lake, Wyoming, USA Mai mult

Devonian, Pragian - Jorf, Morocco Mai mult

Muschelkalk, Triassic - Lorraine, France Mai mult

Devonian eifelian - Jebel zireg, Morocco Mai mult

Eocene (49 million years) - Monte Bolca, Italy Mai mult

Upper Jurassic, Tithonian - Boulogne, France Mai mult

Cenomanian, Upper Cretaceous - H'gula, Byblos, Lebanon Mai mult

Lower Cambrian - Issafen, Morocco Mai mult

Devonian, Eifelian or Givetian - near Alnif, Morocco Mai mult

Cretaceous (112 mil y) - Gadoufaoua, Niger Mai mult

Cretaceous, Aptian - Walsh River area, Queensland, Australia Mai mult

Silurian - Rodchester shale, Middleport, New York - USA Mai mult

Carboniferous, Pennsylvannian - Sparta, Illinois, USA Mai mult