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Scaphites nigricollensis
935
Type
Zone
Age range
90.65–90.24
Ma
International Timescale
Late Cretaceous
Turonian
Ammonite Zonation - Western Interior
Prionocyclus germari
Scaphites nigricollensis
Scaphites whitfieldi
90.66
90.64
90.62
90.60
90.58
90.56
90.54
90.52
90.50
90.48
90.46
90.44
90.42
90.40
90.38
90.36
90.34
90.32
90.30
90.28
90.26
90.24
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