Areosphaeridium |
Areosphaeridium polypetellum
|
Nd |
Early Eocene |
Middle Eocene |
Areosphaeridium |
Areosphaeridium polypetellum
|
England(Hampshire) |
Middle Eocene |
|
Baltisphaeridium |
Baltisphaeridium placacanthum
|
Nd |
Nd |
|
Cleistosphaeridium |
Cleistosphaeridium
|
England(Isle of Wight) |
Early Eocene |
|
Cleistosphaeridium |
Cleistosphaeridium ancyreum
|
Nd |
Early Eocene |
Middle Miocene |
Cleistosphaeridium |
Cleistosphaeridium ancyreum
|
Australia(Victoria) |
Late Eocene |
|
Cleistosphaeridium |
Cleistosphaeridium diversispinosum
|
Nd |
Early Eocene |
Early Oligocene |
Cleistosphaeridium |
Cleistosphaeridium diversispinosum
|
England(Isle of Wight) |
Early Eocene |
|
Cleistosphaeridium |
Cleistosphaeridium placacanthum
|
Nd |
Middle Eocene |
Middle Miocene |
Cleistosphaeridium |
Cleistosphaeridium placacanthum
|
Australia(Victoria) |
Middle Miocene |
|
Cleistosphaeridium |
Cleistosphaeridium polypetellum
|
Nd |
Early Eocene |
Middle Eocene |
Cleistosphaeridium |
Cleistosphaeridium polypetellum
|
England(Hampshire) |
Middle Eocene |
|
Hystrichosphaeridium |
Hystrichosphaeridium placacanthum
|
Australia(Victoria) |
Middle Miocene |
|
Impletosphaeridium |
Impletosphaeridium placacanthum
|
Nd |
Nd |
|
Systematophora |
Systematophora ancyrea
|
Nd |
Early Eocene |
Middle Miocene |
Systematophora |
Systematophora ancyrea
|
Australia(Victoria) |
Late Eocene |
|
Systematophora |
Systematophora diversispinosa
|
Nd |
Early Eocene |
Early Oligocene |