Cleistosphaeridium |
Cleistosphaeridium panshanense
|
China(Hopei) |
Early Oligocene |
Middle Oligocene |
Impletosphaeridium |
Impletosphaeridium radiculopse
|
China(Sinkiang Uighur) |
Santonian |
Maastrichtian |
Cleistosphaeridium |
Cleistosphaeridium radiculopse
|
China(Sinkiang Uighur) |
Santonian |
Maastrichtian |
Downiesphaeridium |
Downiesphaeridium flexuosum
|
England |
Cenomanian |
|
Cleistosphaeridium |
Cleistosphaeridium flexuosum
|
England |
Cenomanian |
|
Impletosphaeridium |
Impletosphaeridium ehrenbergii
|
England |
Oxfordian |
|
Hystrichosphaeridium |
Hystrichosphaeridium ehrenbergii
|
England |
Oxfordian |
|
Impletosphaeridium |
Impletosphaeridium selseyense
|
England |
Early Eocene |
Middle Eocene |
Cleistosphaeridium |
Cleistosphaeridium selseyense
|
England |
Early Eocene |
Middle Eocene |
Systematophora |
Systematophora diversispinosa
|
England |
Early Eocene |
|
Cleistosphaeridium |
Cleistosphaeridium diversispinosum
|
England |
Early Eocene |
|
Impletosphaeridium |
Impletosphaeridium lumectum
|
England(Dorset) |
Middle Callovian |
Late Oxfordian |
Baltisphaeridium |
Baltisphaeridium lumectum
|
England(Dorset) |
Middle Callovian |
Late Oxfordian |
Sentusidinium |
Sentusidinium microcystum
|
England(Hampshire) |
Late Eocene |
|
Tenua |
Tenua microcysta
|
England(Hampshire) |
Late Eocene |
|
Cleistosphaeridium |
Cleistosphaeridium
|
England(Isle of Wight) |
Early Eocene |
|
Downiesphaeridium |
Downiesphaeridium
|
England(Isle of Wight) |
Middle Eocene |
|