Hystrichosphaerina |
Hystrichosphaerina schindewolfii
|
Nd |
Nd |
|
Hystrichosphaeropsis |
Hystrichosphaeropsis
|
Worldwide |
Oxfordian |
Early Pliocene |
Hystrichosphaeropsis |
Hystrichosphaeropsis ovum
|
Nd |
Nd |
|
Hystrichosphaeropsis |
Hystrichosphaeropsis quasicribrata
|
Nd |
Nd |
|
Hystrichostrogylon |
Hystrichostrogylon
|
Worldwide |
Late Eocene |
|
Hystrichostrogylon |
Hystrichostrogylon membraniphorum
|
Nd |
Nd |
|
Impagidinium |
Impagidinium
|
Worldwide |
Barremian |
Recent |
Impagidinium |
Impagidinium alectrolophum
|
Nd |
Nd |
|
Impagidinium |
Impagidinium dispertitum
|
Nd |
Nd |
|
Impletosphaeridium |
Impletosphaeridium
|
Worldwide |
Paleocene |
Middle Miocene |
Impletosphaeridium |
Impletosphaeridium transfodum
|
Nd |
Nd |
|
Isabelidinium |
Isabelidinium
|
Worldwide |
Albian |
Early Eocene |
Isabelidinium |
Isabelidinium korojonense
|
Nd |
Nd |
|
Isabelidinium |
Isabelidinium seelandicum
|
Nd |
Nd |
|
Isthmocystis |
Isthmocystis
|
Worldwide |
Valanginian |
|
Isthmocystis |
Isthmocystis distincta
|
Nd |
Nd |
|
Jansonia |
Jansonia
|
Worldwide |
Late Bajocian |
|