Hystrichosphaera |
Hystrichosphaera hyperacantha
|
Nd |
Early Miocene |
Late Miocene |
Hystrichosphaera |
Hystrichosphaera mirabilis
|
Nd |
Pleistocene |
Holocene |
Hystrichosphaera |
Hystrichosphaera monilis
|
Nd |
Early Eocene |
|
Hystrichosphaera |
Hystrichosphaera pedata
|
Nd |
Coniacian |
Maastrichtian |
Hystrichosphaera |
Hystrichosphaera perforata
|
Nd |
Early Eocene |
|
Hystrichosphaera |
Hystrichosphaera porosa
|
Nd |
Albian |
Turonian |
Hystrichosphaera |
Hystrichosphaera ramosa
|
Nd |
Late Oxfordian |
Holocene |
Hystrichosphaera |
Hystrichosphaera rubina
|
Nd |
Pleistocene |
Holocene |
Hystrichosphaera |
Hystrichosphaera setosa
|
Nd |
Coniacian |
Maastrichtian |
Hystrichosphaera |
Hystrichosphaera speciosa
|
Nd |
Coniacian |
Middle Miocene |
Hystrichosphaera |
Hystrichosphaera tertiaria
|
Nd |
Late Eocene |
Late Oligocene |
Hystrichosphaera |
Hystrichosphaera wetzelii
|
Nd |
Coniacian |
Maastrichtian |
Hystrichosphaeridium |
Hystrichosphaeridium arborispinum
|
Nd |
Middle Barremian |
Late Barremian |
Hystrichosphaeridium |
Hystrichosphaeridium arundum
|
Nd |
Albian |
Early Cenomanian |
Hystrichosphaeridium |
Hystrichosphaeridium bowerbankii
|
Nd |
Albian |
Turonian |
Hystrichosphaeridium |
Hystrichosphaeridium cruciatum
|
Nd |
Coniacian |
Maastrichtian |
Hystrichosphaeridium |
Hystrichosphaeridium deanei
|
Nd |
Late Cenomanian |
|