Hystrichosphaeridium |
Hystrichosphaeridium irregulare
|
Canada |
Late Barremian |
|
Hystrichosphaeridium |
Hystrichosphaeridium kiowanum
|
Kansas |
Albian |
|
Hystrichosphaeridium |
Hystrichosphaeridium latirictum
|
England(Isle of Wight) |
Eocene |
|
Hystrichosphaeridium |
Hystrichosphaeridium latirictum
|
England(Berkshire) |
Eocene |
|
Hystrichosphaeridium |
Hystrichosphaeridium lobospinosum
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium magdalium
|
California |
Danian |
|
Hystrichosphaeridium |
Hystrichosphaeridium magnarmatum
|
Kansas |
Albian |
|
Hystrichosphaeridium |
Hystrichosphaeridium mantellii
|
England |
Early Cenomanian |
|
Hystrichosphaeridium |
Hystrichosphaeridium mariannae
|
France |
Senonian |
|
Hystrichosphaeridium |
Hystrichosphaeridium marsupium
|
Kansas |
Albian |
|
Hystrichosphaeridium |
Hystrichosphaeridium mineralosum
|
India |
Eocene |
Oligocene |
Hystrichosphaeridium |
Hystrichosphaeridium mineralosum
|
India |
Eocene |
Oligocene |
Hystrichosphaeridium |
Hystrichosphaeridium mineralosum
|
India |
Eocene |
Oligocene |
Hystrichosphaeridium |
Hystrichosphaeridium multicornutum
|
New Jersey |
Late Cretaceous |
|
Hystrichosphaeridium |
Hystrichosphaeridium patulum
|
England(Yorkshire) |
Eocene |
|
Hystrichosphaeridium |
Hystrichosphaeridium perovatum
|
Kansas |
Albian |
|
Hystrichosphaeridium |
Hystrichosphaeridium perplexum
|
India |
Eocene |
Oligocene |