Odontochitinopsis |
Odontochitinopsis molesta
|
Nd |
Coniacian |
Maastrichtian |
Oligosphaeridium |
Oligosphaeridium albertense
|
Nd |
Late Barremian |
|
Oligosphaeridium |
Oligosphaeridium anthophorum
|
Nd |
Oxfordian |
Albian |
Oligosphaeridium |
Oligosphaeridium asterigerum
|
Nd |
Late Valanginian |
Barremian |
Oligosphaeridium |
Oligosphaeridium complex
|
Nd |
Late Valanginian |
Early Eocene |
Oligosphaeridium |
Oligosphaeridium dictyophorum
|
Nd |
Oxfordian |
Hauterivian |
Oligosphaeridium |
Oligosphaeridium dispare
|
Nd |
Albian |
|
Oligosphaeridium |
Oligosphaeridium irregulare
|
Nd |
Hauterivian |
Barremian |
Oligosphaeridium |
Oligosphaeridium macrotubulum
|
Nd |
Nd |
|
Oligosphaeridium |
Oligosphaeridium paradoxum
|
Nd |
Late Oligocene |
|
Oligosphaeridium |
Oligosphaeridium prolixispinosum
|
Nd |
Cenomanian |
|
Oligosphaeridium |
Oligosphaeridium pulcherrimum
|
Nd |
Valanginian |
Early Eocene |
Oligosphaeridium |
Oligosphaeridium reniforme
|
Nd |
Albian |
Cenomanian |
Oligosphaeridium |
Oligosphaeridium reticulatum
|
Nd |
Early Cenomanian |
|
Oligosphaeridium |
Oligosphaeridium vasiformum
|
Nd |
Late Hauterivian |
Early Barremian |
Omatia |
Omatia montgomeryi
|
Nd |
Kimmeridgian |
Tithonian |
Omatia |
Omatia pisciformis
|
Nd |
Kimmeridgian |
Tithonian |