Hystrichosphaeridium |
Hystrichosphaeridium
|
Nd |
Nd |
|
Hystrichosphaeridium |
Hystrichosphaeridium aculeatum
|
Nd |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium annulatum
|
USSR(Pre-Baltic) |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium apiculatum
|
Nd |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium arrectum
|
USSR(Pre-Baltic) |
Early Ordovician |
Middle Ordovician |
Hystrichosphaeridium |
Hystrichosphaeridium astarte
|
Nd |
Late Givetian |
|
Hystrichosphaeridium |
Hystrichosphaeridium asteroideum
|
Nd |
Late Cretaceous |
|
Hystrichosphaeridium |
Hystrichosphaeridium atavum
|
USSR |
Cambrian |
|
Hystrichosphaeridium |
Hystrichosphaeridium baciferum
|
Nd |
Late Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium balticum
|
Nd |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium bimarginatum
|
Nd |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium bohemicum
|
Nd |
Silurian |
|
Hystrichosphaeridium |
Hystrichosphaeridium borracherosum
|
Nd |
Ludlovian |
|
Hystrichosphaeridium |
Hystrichosphaeridium brevifurcatum
|
Nd |
Late Llandoverian |
|
Hystrichosphaeridium |
Hystrichosphaeridium brevispinosum
|
Nd |
Silurian |
|
Hystrichosphaeridium |
Hystrichosphaeridium brevispinosum
|
Nd |
Silurian |
|
Hystrichosphaeridium |
Hystrichosphaeridium brevispinosum
|
Nd |
Late Givetian |
|