Type
Zone
Age range
35.8–34.3 Ma
Eocene
Priabonian
H. alabamensis HOZ
G. index HOZ
G. semiinvoluta HOZ
H. alabamensis HOZ
G. index HOZ
G. semiinvoluta HOZ
35.835.735.635.535.435.335.235.135.034.934.834.734.634.534.434.3