Sestrosporites |
Sestrosporites pseudoalveolatus
|
Russian Platform |
Volgian |
Ryazanian |
Sirmiodiniopsis |
Sirmiodiniopsis orbis
|
Russian Platform |
Bathonian |
Kimmeridgian |
Sirmiodinium |
Sirmiodinium grossii
|
Russia(Siberia) |
Callovian |
|
Sirmiodinium |
Sirmiodinium grossii
|
Russian Platform |
Bathonian |
Ryazanian |
Spiniferites |
Spiniferites sp
|
Russian Platform |
Kimmeridgian |
Middle Volgian |
Stephanelytron |
Stephanelytron caytonense
|
Russian Platform |
Bathonian |
Kimmeridgian |
Stephanelytron |
Stephanelytron redcliffense
|
Russian Platform |
Bathonian |
Kimmeridgian |
Stephanelytron |
Stephanelytron scarburghense
|
Russian Platform |
Bathonian |
Kimmeridgian |
Stephanelytron |
Stephanelytron sp
|
Russian Platform |
Oxfordian |
Middle Oxfordian |
Stiphrosphaeridium |
Stiphrosphaeridium dictyophorum
|
Russian Platform |
Ryazanian |
|
Subtilisphaera |
Subtilisphaera inaffecta
|
Russian Platform |
Late Kimmeridgian |
Early Volgian |
Subtilisphaera |
Subtilisphaera paeminosa
|
Russian Platform |
Late Kimmeridgian |
Early Volgian |
Surculosphaeridium |
Surculosphaeridium vestitum
|
Russian Platform |
Late Callovian |
Early Oxfordian |
Susadinium |
Susadinium faustum
|
Russia(Siberia) |
Late Toarcian |
|
Susadinium |
Susadinium scrofoides
|
Russia(Siberia) |
Late Pliensbachian |
Aalenian |
Systematophora |
Systematophora areolata
|
Russian Platform |
Late Callovian |
Ryazanian |
Systematophora |
Systematophora daveyi
|
Russian Platform |
Late Callovian |
Ryazanian |