Baltisphaeridium |
Baltisphaeridium pungens
|
USSR(Pre-Baltic) |
Middle Cambrian |
Late Cambrian |
Baltisphaeridium |
Baltisphaeridium ravum
|
USSR(Russian Platform) |
Middle Ordovician |
|
Baltisphaeridium |
Baltisphaeridium ravum
|
England(Shropshire) |
Wenlockian |
|
Baltisphaeridium |
Baltisphaeridium rigens
|
USSR(Russian Platform) |
Tremadocian |
Wenlockian |
Baltisphaeridium |
Baltisphaeridium rigens
sp. nov. |
USSR(Russian Platform) |
Tremadocian |
|
Baltisphaeridium |
Baltisphaeridium rigidum
sp. nov. |
USSR(Yaroslav) |
Llanvirnian |
|
Baltisphaeridium |
Baltisphaeridium robustispinosum
|
USSR(Russian Platform) |
Llanvirnian |
|
Baltisphaeridium |
Baltisphaeridium rugosum
|
USSR(Russian Platform) |
Ordovician |
Silurian |
Baltisphaeridium |
Baltisphaeridium rugosum
|
USSR(Estonian SSR) |
Early Gothlandian |
|
Baltisphaeridium |
Baltisphaeridium setigerum
|
USSR(Russian Platform) |
Early Ordovician |
Middle Ordovician |
Baltisphaeridium |
Baltisphaeridium setigerum
sp. nov. |
USSR(Yaroslav) |
Arenigian |
|
Baltisphaeridium |
Baltisphaeridium snigirevskae
|
USSR(Russian Platform) |
Llanvirnian |
Early Gothlandian |
Baltisphaeridium |
Baltisphaeridium snigirevskae
|
Belgium |
Tarannon |
|
Baltisphaeridium |
Baltisphaeridium stellarie
|
USSR(Russian Platform) |
Early Ordovician |
Middle Ordovician |
Baltisphaeridium |
Baltisphaeridium stellarie
sp. nov. |
USSR(Yaroslav) |
Middle Ordovician |
|
Baltisphaeridium |
Baltisphaeridium trifurcatum
|
USSR(Russian Platform) |
Caradocian |
|
Baltisphaeridium |
Baltisphaeridium unguisum
|
USSR(Russian Platform) |
Ordovician |
|