Hystrichosphaeridium |
Hystrichosphaeridium stellatum
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium stephanophorum
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium striolatum
|
France |
Cenomanian |
|
Hystrichosphaeridium |
Hystrichosphaeridium sylhetii
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium tiara
|
W.Germany(Schleswig) |
Middle Eocene |
Late Eocene |
Hystrichosphaeridium |
Hystrichosphaeridium toryna
|
Australia(W.Australia) |
Tithonian |
|
Hystrichosphaeridium |
Hystrichosphaeridium transculentum
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium tubiferum
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium unituberculatum
|
Kansas |
Albian |
|
Hystrichosphaeridium |
Hystrichosphaeridium verbinense
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium whitei
|
France(Normandie) |
Senonian |
|
Hystrichosphaerina |
Hystrichosphaerina orbifera
|
Germany |
Oxfordian |
|
Hystrichosphaerina |
Hystrichosphaerina schindewolfii
|
Nd |
Nd |
|
Hystrichosphaerina |
Hystrichosphaerina turonica
|
Nd |
Nd |
|
Hystrichosphaeropsis |
Hystrichosphaeropsis complanata
|
Nd |
Nd |
|
Hystrichosphaeropsis |
Hystrichosphaeropsis downiei
|
Canada(W.Canada) |
Kimmeridgian |
|
Hystrichosphaeropsis |
Hystrichosphaeropsis galeata
|
Nd |
Nd |
|