Hystrichosphaeridium |
Hystrichosphaeridium malleoferum
|
Nd |
Cretaceous |
|
Hystrichosphaeridium |
Hystrichosphaeridium malum
|
Nd |
Ludlovian |
|
Hystrichosphaeridium |
Hystrichosphaeridium maslovii
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium membranaceum
|
Nd |
Late Cretaceous |
|
Hystrichosphaeridium |
Hystrichosphaeridium mensula
|
Nd |
Late Cretaceous |
|
Hystrichosphaeridium |
Hystrichosphaeridium meson
|
Nd |
Late Llandoverian |
Late Ludlovian |
Hystrichosphaeridium |
Hystrichosphaeridium microfurcatum
|
Nd |
Middle Devonian |
|
Hystrichosphaeridium |
Hystrichosphaeridium microspinosum
|
Nd |
Late Llandoverian |
|
Hystrichosphaeridium |
Hystrichosphaeridium monacanthum
|
Nd |
Middle Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium multipilosum
|
Nd |
Silurian |
|
Hystrichosphaeridium |
Hystrichosphaeridium multipilosum
|
Nd |
Silurian |
|
Hystrichosphaeridium |
Hystrichosphaeridium multipilosum
|
Nd |
Late Givetian |
|
Hystrichosphaeridium |
Hystrichosphaeridium mutabile
|
Nd |
Late Givetian |
|
Hystrichosphaeridium |
Hystrichosphaeridium nudatum
|
Nd |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium ohioense
|
Nd |
Late Devonian |
|
Hystrichosphaeridium |
Hystrichosphaeridium oligacanthum
|
Nd |
Danian |
|
Hystrichosphaeridium |
Hystrichosphaeridium oligacanthum
|
Nd |
Paleocene |
|