Pulvinosphaeridium |
Pulvinosphaeridium pulvinellum
|
Sweden |
Paleozoic |
|
Baltisphaeridium |
Baltisphaeridium multipilosum
|
USSR(Baltic) |
Late Ordovician |
|
Baltisphaeridium |
Baltisphaeridium longispinosum
|
USSR(Estonian SSR) |
Pleistocene |
|
Baltisphaeridium |
Baltisphaeridium longispinosum
|
USSR(Estonian SSR) |
Late Ordovician |
|
Bacisphaeridium |
Bacisphaeridium bacifer
|
USSR(Estonian SSR) |
Late Ordovician |
|
Baltisphaeridium |
Baltisphaeridium longispinosum
|
USSR(Leningrad) |
Early Ordovician |
|
Leiosphaeridia |
Leiosphaeridia sp
|
W.Germany(N.Rhine) |
Devonian |
|