Hystrichosphaeridium |
Hystrichosphaeridium hirsutoides
|
Nd |
Late Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium horridum
|
Nd |
Late Cretaceous |
|
Hystrichosphaeridium |
Hystrichosphaeridium huecospinosum
|
Nd |
Emsian |
|
Hystrichosphaeridium |
Hystrichosphaeridium hymenoferum
|
USSR(Baltic) |
Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium hystrichoreticulatum
|
Nd |
Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium inconspicuum
|
Nd |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium insigne
|
Nd |
Early Cambrian |
Middle Cambrian |
Hystrichosphaeridium |
Hystrichosphaeridium integrum
|
Nd |
Late Givetian |
|
Hystrichosphaeridium |
Hystrichosphaeridium intermedium
|
Nd |
Late Llandoverian |
Late Ludlovian |
Hystrichosphaeridium |
Hystrichosphaeridium lairdii
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium lewisii
|
Nd |
Middle Devonian |
|
Hystrichosphaeridium |
Hystrichosphaeridium longispinosoides
|
Nd |
Late Givetian |
|
Hystrichosphaeridium |
Hystrichosphaeridium longispinosum
|
Nd |
Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium longispinosum
|
Nd |
Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium longispinosum
|
Nd |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium longofilum
|
Nd |
Middle Oligocene |
|
Hystrichosphaeridium |
Hystrichosphaeridium lucidum
|
Nd |
Caradocian |
|