Type
Subzone
Age range
0.61–0 Ma
Holocene
Meghalayan
Northgrippian
Greenlandian
Pleistocene
Late Pleistocene
Chibanian
G. truncatulinoides PRSZ
G. tosaensis HOSZ
0.600.550.500.450.400.350.300.250.200.150.100.050.00