Type
Subchron
Age range
73.949–73.649 Ma
Late Cretaceous
Campanian
C32n.2n
C32r.1r
C32r.1n
73.9673.9473.9273.9073.8873.8673.8473.8273.8073.7873.7673.7473.7273.7073.6873.6673.64