Type
Zone
Age range
99.17–98.75 Ma
Late Cretaceous
Cenomanian
Neogastroplites americanus
Neogastroplites muelleri
Neogastroplites cornutus
99.1899.1699.1499.1299.1099.0899.0699.0499.0299.0098.9898.9698.9498.9298.9098.8898.8698.8498.8298.8098.7898.7698.74