Hystrichosphaera |
Hystrichosphaera xanthiopyxides
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium aemulum
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium albertense
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium alcicornu
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium amalthei
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium ancoriferum
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium anthophorum
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium aquitanicum
|
Nd |
Cretaceous |
|
Hystrichosphaeridium |
Hystrichosphaeridium arborispinum
|
Nd |
Early Barremian |
Middle Barremian |
Hystrichosphaeridium |
Hystrichosphaeridium armatum
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium aruncium
|
Nd |
Albian |
|
Hystrichosphaeridium |
Hystrichosphaeridium arundum
|
Nd |
Albian |
|
Hystrichosphaeridium |
Hystrichosphaeridium ashdodense
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium asperum
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium assamicum
|
Nd |
Late Cretaceous |
|
Hystrichosphaeridium |
Hystrichosphaeridium asterigerum
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium asymmetricum
|
Nd |
Nd |
|