Hystrichosphaeridium |
Hystrichosphaeridium cognitum
|
USSR(Russian Platform) |
Middle Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium conspicuum
|
USSR(Russian Platform) |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium hippocrepicum
|
USSR(Russian Platform) |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium longispinosum
|
USSR(Russian Platform) |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium nudatum
|
USSR(Russian Platform) |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium nudatum
|
USSR(Russian Platform) |
Middle Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium ordovicum
|
USSR(Russian Platform) |
Middle Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium pateum
|
USSR(Russian Platform) |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium pateum
|
USSR(Russian Platform) |
Middle Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium polyradiatum
sp. nov. |
USSR(Russian Platform) |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium polyradiatum
|
USSR(Russian Platform) |
Middle Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium quadriradiatum
|
USSR(Russian Platform) |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium quadriradiatum
|
USSR(Russian Platform) |
Middle Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium rigens
|
USSR(Russian Platform) |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium rigens
|
USSR(Russian Platform) |
Middle Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium rjabininii
|
USSR(Russian Platform) |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium rjabininii
|
USSR(Russian Platform) |
Middle Ordovician |
|