Hystrichosphaeridium |
Hystrichosphaeridium breviatum
|
W.Germany |
Early Eocene |
|
Hystrichosphaeridium |
Hystrichosphaeridium calvum
|
Kansas |
Albian |
|
Hystrichosphaeridium |
Hystrichosphaeridium cambayense
|
India |
Eocene |
Oligocene |
Hystrichosphaeridium |
Hystrichosphaeridium coelenteratum
|
Kansas |
Albian |
|
Hystrichosphaeridium |
Hystrichosphaeridium collum
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium costatum
|
England(Yorkshire) |
Oxfordian |
|
Hystrichosphaeridium |
Hystrichosphaeridium cylindratum
|
W.Germany |
Early Eocene |
|
Hystrichosphaeridium |
Hystrichosphaeridium dictyostilum
|
Argentina |
Eocene |
Oligocene |
Hystrichosphaeridium |
Hystrichosphaeridium difficile
|
Canada(Arctic) |
Late Cretaceous |
|
Hystrichosphaeridium |
Hystrichosphaeridium dispare
|
Kansas |
Albian |
|
Hystrichosphaeridium |
Hystrichosphaeridium eccentrum
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium echinatum
|
Argentina |
Late Cretaceous |
|
Hystrichosphaeridium |
Hystrichosphaeridium entomium
|
Kansas |
Albian |
|
Hystrichosphaeridium |
Hystrichosphaeridium erectum
|
Canada(Arctic) |
Late Cretaceous |
|
Hystrichosphaeridium |
Hystrichosphaeridium fabium
|
Kansas |
Albian |
|
Hystrichosphaeridium |
Hystrichosphaeridium follium
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium inodes
|
Nd |
Nd |
|