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Prionocyclus macombi
932
Type
Zone
Age range
91.6–91.41
Ma
International Timescale
Late Cretaceous
Turonian
Ammonite Zonation - Western Interior
Scaphites warreni
Prionocyclus macombi
Prionocyclus hyatti
91.60
91.59
91.58
91.57
91.56
91.55
91.54
91.53
91.52
91.51
91.50
91.49
91.48
91.47
91.46
91.45
91.44
91.43
91.42
91.41
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