Omatidium |
Omatidium
|
France(Rhone) |
Late Oxfordian |
|
Ovalicysta |
Ovalicysta
|
Spitsbergen |
Toarcian |
|
Parvocysta |
Parvocysta
|
Spitsbergen |
Toarcian |
|
Parvocysta |
Parvocysta cracens
|
Spitsbergen |
Toarcian |
|
Paucisphaeridium |
Paucisphaeridium
|
England(Berkshire) |
Ypresian |
|
Pervosphaeridium |
Pervosphaeridium
|
W.Germany(N.Rhine) |
Early Santonian |
|
Pervosphaeridium |
Pervosphaeridium truncigerum
|
W.Germany(N.Rhine) |
Early Santonian |
|
Phallocysta |
Phallocysta
|
Canada(Arctic) |
Toarcian |
Bathonian |
Plethysyrinx |
Plethysyrinx
|
W.Germany(Schleswig) |
Middle Eocene |
Late Eocene |
Plethysyrinx |
Plethysyrinx lata
|
W.Germany(Schleswig) |
Middle Eocene |
Late Eocene |
Plethysyrinx |
Plethysyrinx lemniscata
|
W.Germany(Schleswig) |
Middle Eocene |
Late Eocene |
Pseudomuderongia |
Pseudomuderongia
|
Nd |
Nd |
|
Pseudomuderongia |
Pseudomuderongia asymmetrica
|
Canada(NWT,Mackenzie) |
Aptian |
Early Albian |
Pseudomuderongia |
Pseudomuderongia testudinaria
|
Australia(Queensland) |
Hauterivian |
Barremian |
Reticulatosphaera |
Reticulatosphaera
|
Japan(Honshu I.) |
Pliocene |
|
Reutlingia |
Reutlingia
|
W.Germany(Baden) |
Callovian |
Early Oxfordian |
Rhiptocorys |
Rhiptocorys
|
France(Paris Basin) |
Senonian |
|