Cleistosphaeridium |
Cleistosphaeridium separatum
|
Canada(NWT,Mackenzie) |
Early Valanginian |
Middle Valanginian |
Cleistosphaeridium |
Cleistosphaeridium spinosum
|
Nd |
Nd |
|
Cleistosphaeridium |
Cleistosphaeridium spissum
|
Canada(NWT,Mackenzie) |
Early Valanginian |
Middle Valanginian |
Compositosphaeridium |
Compositosphaeridium bulgaricum
|
Nd |
Nd |
|
Compositosphaeridium |
Compositosphaeridium polonicum
|
Nd |
Nd |
|
Cordosphaeridium |
Cordosphaeridium truncigerum
|
Nd |
Nd |
|
Cribroperidinium |
Cribroperidinium comptum
|
England(Yorkshire) |
Middle Barremian |
Late Barremian |
Cribroperidinium |
Cribroperidinium cornutum
|
Nd |
Nd |
|
Cribroperidinium |
Cribroperidinium crispum
|
Nd |
Nd |
|
Cribroperidinium |
Cribroperidinium orthoceras
|
Nd |
Nd |
|
Ctenidodinium |
Ctenidodinium adelum
|
England |
Late Bajocian |
|
Cyclonephelium |
Cyclonephelium attadalicum
|
Nd |
Nd |
|
Cyclonephelium |
Cyclonephelium brevispinosum
|
Canada(W.Canada) |
Aptian |
|
Cyclonephelium |
Cyclonephelium combinatum
|
China(Hopei) |
Early Oligocene |
Middle Oligocene |
Cyclonephelium |
Cyclonephelium regulatum
|
China(Hopei) |
Early Oligocene |
Middle Oligocene |
Cyclonephelium |
Cyclonephelium semitectum
|
England(Hampshire) |
Late Eocene |
|
Cyclonephelium |
Cyclonephelium variatum
|
China(Hopei) |
Early Oligocene |
Middle Oligocene |