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Acanthoceras amphibolum
914
Type
Zone
Age range
95.9–95.81
Ma
International Timescale
Late Cretaceous
Cenomanian
Ammonite Zonation - Western Interior
Pleisacanthoceras wyomingense
Acanthoceras amphibolum
Acanthoceras bellense
95.90
95.89
95.89
95.89
95.88
95.88
95.87
95.86
95.86
95.86
95.85
95.84
95.84
95.83
95.83
95.83
95.82
95.81
95.81
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