Hystrichosphaeridium |
Hystrichosphaeridium bimarginatum
sp. nov. |
USSR(Pre-Baltic) |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium brevispinosum
sp. nov. |
USSR(Pre-Baltic) |
Early Ordovician |
Middle Ordovician |
Hystrichosphaeridium |
Hystrichosphaeridium circumscissum
sp. nov. |
USSR(Pre-Baltic) |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium cognitum
sp. nov. |
USSR(Pre-Baltic) |
Early Ordovician |
Middle Ordovician |
Hystrichosphaeridium |
Hystrichosphaeridium conspicuum
sp. nov. |
USSR(Pre-Baltic) |
Late Cambrian |
|
Hystrichosphaeridium |
Hystrichosphaeridium corollatum
sp. nov. |
USSR(Pre-Baltic) |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium hippocrepicum
sp. nov. |
USSR(Pre-Baltic) |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium hirsutoides
|
USSR(Pre-Baltic) |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium inconspicuum
sp. nov. |
USSR(Pre-Baltic) |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium longispinosoides
|
USSR(Pre-Baltic) |
Late Cambrian |
Middle Ordovician |
Hystrichosphaeridium |
Hystrichosphaeridium nudatum
sp. nov. |
USSR(Pre-Baltic) |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium ordovicum
sp. nov. |
USSR(Pre-Baltic) |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium pateum
sp. nov. |
USSR(Pre-Baltic) |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium quadriradiatum
sp. nov. |
USSR(Pre-Baltic) |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium rigens
sp. nov. |
USSR(Pre-Baltic) |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium rjabininii
sp. nov. |
USSR(Pre-Baltic) |
Early Ordovician |
|
Hystrichosphaeridium |
Hystrichosphaeridium setigerfurcatum
sp. nov. |
USSR(Pre-Baltic) |
Early Ordovician |
|