Areosphaeridium |
Areosphaeridium polypetellum
|
Nd |
Nd |
|
Impletosphaeridium |
Impletosphaeridium spiralisetum
|
Netherlands |
Maastrichtian |
|
Hystrichosphaeridium |
Hystrichosphaeridium spiralisetum
|
Netherlands |
Maastrichtian |
|
Impletosphaeridium |
Impletosphaeridium brevibaculum
|
Pacific(E.China Sea) |
Pleistocene |
|
Cleistosphaeridium |
Cleistosphaeridium brevibaculum
|
Pacific(E.China Sea) |
Pleistocene |
|
Impletosphaeridium |
Impletosphaeridium laxabaculum
|
Pacific(E.China Sea) |
Pleistocene |
|
Cleistosphaeridium |
Cleistosphaeridium laxabaculum
|
Pacific(E.China Sea) |
Pleistocene |
|
Impletosphaeridium |
Impletosphaeridium baculatum
|
Pacific(S.China Sea) |
Late Oligocene |
|
Cleistosphaeridium |
Cleistosphaeridium baculatum
|
Pacific(S.China Sea) |
Late Oligocene |
|
Sentusidinium |
Sentusidinium brevispinosum
|
Senegal |
Early Aptian |
Late Aptian |
Cleistosphaeridium |
Cleistosphaeridium brevispinosum
|
Senegal |
Early Aptian |
Late Aptian |
Impletosphaeridium |
Impletosphaeridium giganteum
|
Spain |
Paleocene |
Eocene |
Polysphaeridium |
Polysphaeridium giganteum
|
Spain |
Paleocene |
Eocene |
Impletosphaeridium |
Impletosphaeridium polyozum
|
W.Germany |
Late Oligocene |
|
Baltisphaeridium |
Baltisphaeridium polyozon
|
W.Germany |
Late Oligocene |
|
Heterosphaeridium |
Heterosphaeridium latoaculeum
|
W.Germany(N.Rhine) |
Early Santonian |
|
Sentusidinium |
Sentusidinium perforoconum
|
W.Germany(N.Rhine) |
Early Santonian |
|