Hystrichosphaeridium |
Hystrichosphaeridium spinosum
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium spiralisetum
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium stellatum
|
Nd |
Oligocene |
Middle Miocene |
Hystrichosphaeridium |
Hystrichosphaeridium stephanophorum
|
Nd |
Middle Oligocene |
Late Oligocene |
Hystrichosphaeridium |
Hystrichosphaeridium striatoconum
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium striolatum
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium tiara
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium toryna
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium transculentum
|
Nd |
Late Cretaceous |
|
Hystrichosphaeridium |
Hystrichosphaeridium tribrachiosum
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium tridactylites
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium triradicosum
|
Nd |
Albian |
|
Hystrichosphaeridium |
Hystrichosphaeridium truncigerum
|
Nd |
Senonian |
|
Hystrichosphaeridium |
Hystrichosphaeridium tubiferum
|
Nd |
Late Cretaceous |
|
Hystrichosphaeridium |
Hystrichosphaeridium tubiferum
sp. nov. |
Nd |
Early Eocene |
|
Hystrichosphaeridium |
Hystrichosphaeridium unituberculatum
|
Nd |
Albian |
|
Hystrichosphaeridium |
Hystrichosphaeridium valgum
|
Nd |
Albian |
|