Aremoricanium |
Aremoricanium
|
Nd |
Nd |
|
Ascostomocystis |
Ascostomocystis
|
Nd |
Nd |
|
Ascostomocystis |
Ascostomocystis hydria
|
Nd |
Nd |
|
Ascostomocystis |
Ascostomocystis potane
|
Nd |
Nd |
|
Asketopalla |
Asketopalla formosula
|
Nd |
Nd |
|
Bacisphaeridium |
Bacisphaeridium bacifer
|
USSR(Estonian SSR) |
Late Ordovician |
|
Bacisphaeridium |
Bacisphaeridium bacifer
|
Finland |
Late Ordovician |
|
Baltisphaeridium |
Baltisphaeridium archaicum
|
Nd |
Nd |
|
Baltisphaeridium |
Baltisphaeridium brevispinosum
sp. nov. |
E.Germany(Potsdam) |
Pleistocene |
|
Baltisphaeridium |
Baltisphaeridium brevispinosum
|
Nd |
Arenigian |
|
Baltisphaeridium |
Baltisphaeridium brevispinosum
|
Nd |
Nd |
|
Baltisphaeridium |
Baltisphaeridium calicispinae
|
Nd |
Nd |
|
Baltisphaeridium |
Baltisphaeridium crassituberculatum
sp. nov. |
Sweden |
Paleozoic |
|
Baltisphaeridium |
Baltisphaeridium longispinosum
|
USSR(Estonian SSR) |
Pleistocene |
|
Baltisphaeridium |
Baltisphaeridium longispinosum
|
Sweden |
Early Caradocian |
|
Baltisphaeridium |
Baltisphaeridium longispinosum
|
USSR(Estonian SSR) |
Late Ordovician |
|
Baltisphaeridium |
Baltisphaeridium longispinosum
|
USSR(Leningrad) |
Early Ordovician |
|