Type
Zone
Age range
34.3–33.8 Ma
Oligocene
Rupelian
Eocene
Priabonian
P. naguewichiensis HOZ
H. alabamensis HOZ
G. index HOZ
P. naguewichiensis HOZ
H. alabamensis HOZ
G. index HOZ
34.3234.3034.2834.2634.2434.2234.2034.1834.1634.1434.1234.1034.0834.0634.0434.0234.0033.9833.9633.9433.9233.9033.8833.8633.8433.8233.8033.78