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Clioscaphites vermiformis
942
Type
Zone
Age range
86.26–85.56
Ma
International Timescale
Late Cretaceous
Santonian
Coniacian
Ammonite Zonation - Western Interior
Clioscaphites choteauensis
Clioscaphites vermiformis
Clioscaphites saxitonianus
86.3
86.2
86.2
86.1
86.0
86.0
86.0
85.9
85.8
85.8
85.8
85.7
85.7
85.6
85.5
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