Polysphaeridium |
Polysphaeridium simplex
|
Nd |
Coniacian |
Middle Miocene |
Polysphaeridium |
Polysphaeridium subtile
|
Nd |
Albian |
|
Polysphaeridium |
Polysphaeridium tribrachiosum
|
Nd |
Albian |
|
Polysphaeridium |
Polysphaeridium zoharyi
|
Nd |
Pleistocene |
|
Polystephanephorus |
Polystephanephorus calathus
|
Nd |
Early Oxfordian |
|
Polystephanephorus |
Polystephanephorus paracalathus
|
Nd |
Late Callovian |
|
Polystephanephorus |
Polystephanephorus urnaformis
|
Nd |
Early Oligocene |
|
Prolixosphaeridium |
Prolixosphaeridium conulum
|
Nd |
Late Cenomanian |
|
Prolixosphaeridium |
Prolixosphaeridium deirense
|
Nd |
Middle Barremian |
|
Prolixosphaeridium |
Prolixosphaeridium granulosum
|
Nd |
Late Oxfordian |
Campanian |
Prolixosphaeridium |
Prolixosphaeridium mixtispinosum
|
Nd |
Kimmeridgian |
|
Prolixosphaeridium |
Prolixosphaeridium parvispinum
|
Nd |
Late Oxfordian |
Campanian |
Prolixosphaeridium |
Prolixosphaeridium xanthiopyxides
|
Nd |
Turonian |
Campanian |
Psaligonyaulax |
Psaligonyaulax apatela
|
Nd |
Late Oxfordian |
Tithonian |
Psaligonyaulax |
Psaligonyaulax deflandrei
|
Nd |
Cenomanian |
|
Psaligonyaulax |
Psaligonyaulax simplicia
|
Nd |
Paleocene |
Late Eocene |
Pseudoceratium |
Pseudoceratium dettmanniae
|
Nd |
Late Albian |
Early Cenomanian |