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Scaphites mariasensis
937
Type
Zone
Age range
89.98–89.87
Ma
International Timescale
Late Cretaceous
Turonian
Ammonite Zonation - Western Interior
Scaphites preventricosus
Scaphites mariasensis
Prionocyclus germari
89.98
89.97
89.97
89.97
89.96
89.95
89.95
89.94
89.94
89.94
89.93
89.92
89.92
89.92
89.91
89.91
89.90
89.89
89.89
89.89
89.88
89.88
89.87
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