Type
Zone
Age range
50.4–46.4 Ma
Eocene
Lutetian
Ypresian
G. nuttalli LOZ
A. cuneicamerata LOZ
A. pentacamerata PRZ
50.450.250.049.849.649.449.249.048.848.648.448.248.047.847.647.447.247.046.846.646.4