Baltisphaeridium |
Baltisphaeridium echinodermum
|
USSR(Siberia) |
Silurian |
Devonian |
Baltisphaeridium |
Baltisphaeridium nanninum
|
USSR(Siberia) |
Early Ludlovian |
|
Cymatiosphaera |
Cymatiosphaera devonica
|
USSR(Siberia) |
Devonian |
|
Cymatiosphaera |
Cymatiosphaera leonensis
|
USSR(Siberia) |
Early Devonian |
|
Cymatiosphaera |
Cymatiosphaera multisepta
|
USSR(Siberia) |
Early Devonian |
|
Cymatiosphaera |
Cymatiosphaera pavimenta
|
USSR(Siberia) |
Silurian |
Devonian |
Dictyotidium |
Dictyotidium stenodictyum
|
USSR(Siberia) |
Early Ludlovian |
|
Hystrichosphaeridium |
Hystrichosphaeridium sp
|
USSR(Siberia) |
Devonian |
|
Leiofusa |
Leiofusa tumida
|
USSR(Siberia) |
Early Devonian |
|
Leiosphaeridia |
Leiosphaeridia atratus
|
USSR(Siberia) |
Silurian |
Devonian |
Leiosphaeridia |
Leiosphaeridia eisenackii
|
USSR(Siberia) |
Devonian |
|
Leiosphaeridia |
Leiosphaeridia sp
|
USSR(Siberia) |
Early Devonian |
|
Leiosphaeridia |
Leiosphaeridia sphaerica
|
USSR(Siberia) |
Devonian |
|
Lophosphaeridium |
Lophosphaeridium magnum
|
USSR(Siberia) |
Devonian |
|
Lophosphaeridium |
Lophosphaeridium parverarum
|
USSR(Siberia) |
Silurian |
Devonian |
Lophosphaeridium |
Lophosphaeridium rarum
|
USSR(Siberia) |
Silurian |
Devonian |
Pterospermella |
Pterospermella sp
|
USSR(Siberia) |
Early Ludlovian |
|