Type
Zone
Age range
95.67–95.47 Ma
Late Cretaceous
Cenomanian
Dunveganoceras problematicum
Dunveganoceras pondi
Pleisacanthoceras wyomingense
95.6795.6695.6595.6495.6395.6295.6195.6095.5995.5895.5795.5695.5595.5495.5395.5295.5195.5095.4995.4895.47